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    112 Products

    Combination Squares

    Replace your try square, miter square, depth gauge, marking gauge, 90° level, ruler, and scriber with one tool. Blades labeled with numeric increments that are less than 1" are quick-reading.
    Blades with Square Head with Built-In Level
    Image of Product. Front orientation. Contains Annotated. Squares. Combination Squares, Blades with Square Head with Built-In Level.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Combination Squares, Blades with Square Head with Built-In Level, Inch, Metric.

    Inch/Metric

    Square head checks 90° angles.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Plastic Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch/Metric
    12"/304 mm1/32" (8/32"), 1 mm (10 mm)1 mm (10 mm), 1/16" (1")1"3/32"Stainless SteelSilverBlackEtched4 9/16"00000000000
     
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch, Metric, 10 mm Numeric Graduations - 2, 8/32" Numeric Graduations.

    Inch/Metric

    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch, 1" Numeric Graduations - 2, 1" Numeric Graduations.
    Image of Product. Metric. Front orientation. ZoomedIn view. Contains Annotated. Squares. Combination Squares, Blades with Square Head with Built-In Level and Scriber, Metric, 10 mm Numeric Graduations - 2, 10 mm Numeric Graduations.

    Inch

    Metric

    Square head checks 90° angles.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Zinc Alloy
    Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    6"1/16" (1"), 1/32" (1")1/8" (1"), 1/16" (1")13/16"5/64"Stainless SteelSilverBlackEtched3 11/16"000000000000
    12"1/16" (1"), 1/32" (1")1/8" (1"), 1/16" (1")1"3/32"Stainless SteelSilverBlackEtched4 5/8"00000000000
    16"1/16" (1"), 1/32" (1")1/8" (1"), 1/16" (1")1"3/32"Stainless SteelSilverBlackEtched4 5/8"00000000000
     
    Inch/Metric
    12"/300 mm1/32" (8/32"), 1 mm (10 mm)1 mm (10 mm), 1/16" (1")1"3/32"Stainless SteelSilverBlackEtched4 5/8"0000000000000
    16"/400 mm1/32" (8/32"), 1 mm (10 mm)1 mm (10 mm), 1/16" (1")1"3/32"Stainless SteelSilverBlackEtched4 3/4"0000000000000
    6"/150 mm1/32" (8/32"), 1 mm (10 mm)1 mm (10 mm), 1/16" (1")13/16"5/64"Stainless SteelSilverBlackEtched3 11/16"0000000000000
     
    Metric
    150 mm1 mm (10 mm), 1 mm (10 mm)1 mm (10 mm), 1 mm (10 mm)13/16"5/64"Stainless SteelSilverBlackEtched3 11/16"000000000000
    300 mm1 mm (10 mm), 1 mm (10 mm)1 mm (10 mm), 1 mm (10 mm)1"3/32"Stainless SteelSilverBlackEtched4 5/8"000000000000
    400 mm1 mm (10 mm), 1 mm (10 mm)1 mm (10 mm), 1 mm (10 mm)1"3/32"Stainless SteelSilverBlackEtched4 5/8"000000000000
     
    Blades with Square Head, Angle Finder, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Combination Squares, Blades with Square Head, Angle Finder, and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Combination Squares, Blades with Square Head, Angle Finder, and Scriber, Inch, Metric.

    Inch/Metric

    Square head checks 90° angles.
    Angle finder measures any angle from 0° to 90° and has a chart to convert angle to pitch.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Zinc Alloy
    Square Head
    Blade Lg.
    Angle Finder Angle
    Measured Range
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch/Metric
    12"/300 mm0° to 90°1 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/16" (1")1"5/64"SteelSilverBlackEtched4"0000000000000
     
    Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head with Built-In Level, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head with Built-In Level, and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head with Built-In Level, and Scriber, Inch, Metric.

    Inch/Metric

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Aluminum Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch/Metric
    12"/300 mm1 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/16" (1")1"3/32"SteelSilverBlackEtched4 1/4"000000000000
     

    Starrett High-Accuracy Combination Squares

    Replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. The blade on these squares meets Fed. Spec. GGG-R-791H, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading.
    Blades with Square Head
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head .
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head , Inch.

    Inch

    Square head checks 90° angles.
    Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Steel
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    4"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"5/8"1/16"SteelSatinChrome, SilverBlackEtched2 1/4"0000000000000000000000000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt for Square and Center Heads0000000000000
    Blades with Square Head and Center Head
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head and Center Head .
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head and Center Head , Inch.

    Inch

    Square head checks 90° angles.
    Center head identifies the center on pipes, rods, and shafts.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    4"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"5/8"1/16"SteelSatinChrome, SilverBlackEtched2 1/4"00000000000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt for Square and Center Heads0000000000000
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch, Metric, 4/32" Numeric Graduations - 2, 10 mm Numeric Graduations.

    Inch/Metric

    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch, 4/32" Numeric Graduations, 8/64" Numeric Graduations - 2.

    Inch

    Square head checks 90° angles.
    Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Steel
    Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Head
    Lg.
    Each
    Inch
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"3/4"5/64"Steel—SilverBlackEtched2 13/32"00000000000000————0
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"3/4"5/64"SteelSatinChrome, SilverBlackEtched2 13/32"00000000000002 13/32"00000000000000
    6"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.002" to 0.004"3/4"5/64"SteelSatinChrome, SilverBlackEtched2 13/32"00000000000002 13/32"0000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"Steel—SilverBlackEtched4 1/2"0000000000000————0
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"00000000000003 5/8"0000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"00000000000003 5/8"0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"00000000000003 5/8"0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"00000000000003 5/8"0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
     
    Inch/Metric
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/
    -0.09 mm to 0.15 mm    		1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"00000000000003 5/8"0000000000000
    23 1/2"/600 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.007"/
    -0.11 mm to 0.25 mm    		1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade00000000000000
    Replacement Lockbolt for Square and Center Heads000000000000
    Replacement Lockbolt for Square, Center, and Protractor Heads00000000000
    Blades with Square Head with Built-In Level, Center Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber.
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Steel
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Head
    Lg.
    Each
    Inch
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"3/4"5/64"SteelSatinChrome, SilverBlackEtched————02 13/32"00000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"000000000000003 5/8"0000000000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade00000000000000
    Replacement Lockbolt for Center Heads000000000000
    Replacement Lockbolt for Square and Center Heads000000000000
    Replacement Lockbolt for Square, Center, and Protractor Heads00000000000
    Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber.
    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSilverBlackEtched4 1/2"00000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSilverBlackEtched4 1/2"0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SteelSilverBlackEtched4 1/2"0000000000000
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade00000000000000
    Replacement Lockbolt for Square, Center, and Protractor Heads00000000000
    Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber, Inch, Metric, 4/32" Numeric Graduations - 2, 10 mm Numeric Graduations.

    Inch/Metric

    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Starrett High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber, Inch, 4/32" Numeric Graduations, 8/64" Numeric Graduations - 2.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Steel Square Head—Hardened-steel square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Steel
    Square Head
    Blade Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"Steel—SilverBlackEtched4 1/2"00000000000000————0
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"00000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"Steel—SilverBlackEtched4 1/2"0000000000000————0
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"Steel—SilverBlackEtched4 1/2"0000000000000————0
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.006"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.006"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"Steel—SilverBlackEtched4 1/2"0000000000000————0
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.007"1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
     
    Inch/Metric
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/
    -0.09 mm to 0.15 mm    		1"3/32"Steel—SilverBlackEtched4 1/2"0000000000000————0
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/
    -0.09 mm to 0.15 mm    		1"3/32"SteelSatinChrome, SilverBlackEtched————03 5/8"0000000000000
    23 1/2"/600 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.007"/
    -0.11 mm to 0.25 mm    		1"3/32"Steel—SilverBlackEtched4 1/2"0000000000000————0
     
    Replacements for Squares
    Each
    Replacement Case for Combination Squares with 12" Long Blade00000000000000
    Replacement Lockbolt for Square, Center, and Protractor Heads00000000000

    Starrett High-Accuracy Combination Square Blades

    Image of Product. Inch. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Combination Square Blades. Starrett High-Accuracy Combination Square Blades, 4/32" Numeric Graduations.
    Image of Product. Inch/Metric. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Combination Square Blades. Starrett High-Accuracy Combination Square Blades, 10 mm Numeric Graduations.

    Inch

    Inch/Metric

    Use these blades with Starrett High-Accuracy Combination Square Heads. They meet Fed. Spec. GGG-R-791, which establishes uniform standards for accuracy, graduations, and size. Blades are labeled with numeric increments that are less than 1" for quick reading. All have a corrosion-resistant satin chrome-plated finish that reduces glare and wear-resistant etched markings.
    Graduation
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Color
    Color
    Type
    Each
    Inch
     
    Satin Chrome-Plated Steel
    4"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"5/8"1/16"SilverBlackEtched0000000000000
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.004"3/4"5/64"SilverBlackEtched000000000000
    6"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.002" to 0.004"3/4"5/64"SilverBlackEtched000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.005"1"3/32"SilverBlackEtched000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.005"1"3/32"SilverBlackEtched0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SilverBlackEtched0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0035" to 0.007"1"3/32"SilverBlackEtched0000000000000
    36"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0035" to 0.007"1"3/32"SilverBlackEtched0000000000000
     
    Inch/Metric
     
    Satin Chrome-Plated Steel
    11 3/4"/300 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.005"/-0.09 mm to 0.15 mm1"3/32"SilverBlackEtched0000000000000
    23 1/2"/600 mm0.5 mm (10 mm), 1/32" (4/32")1 mm (10 mm), 1/64" (8/64")-0.0035" to 0.007"/-0.11 mm to 0.25 mm1"3/32"SilverBlackEtched0000000000000
     

    Starrett High-Accuracy Combination Square Heads

    Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.
    Square Heads
    Image of Product. Front orientation. Combination Square Heads. Starrett High-Accuracy Combination Square Heads, Square Heads.
    Square heads check 90° angles.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.
    Cast Iron
    Hardened Steel
    For Blade
    Lg.
    Features
    Each
    Each
    4"—00000000000000000000000000
    6"Built-In Level0000000000000000000000000
    12" to 48"Built-In Level0000000000000000000000000
    Replacement Square Head Lockbolts
    Image of Product. Front orientation. Square Head Lockbolts. Starrett High-Accuracy Combination Square Heads.
    For Head Style
    For Blade Lg.
    Each
    Center, Square4"0000000000000
    Center, Square6"000000000000
    Center, Square, Protractor12" to 36"/300 mm to 600 mm00000000000
    Center Heads
    Image of Product. Front orientation. Combination Square Heads. Starrett High-Accuracy Combination Square Heads, Center Heads.
    Center heads identify the center on pipes, rods, and shafts.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Hardened Steel—Hardened steel heads are more durable and last longer than cast iron heads.
    Cast Iron
    Hardened Steel
    For Blade
    Lg.
    Each
    Each
    4"00000000000000000000000000
    6"0000000000000000000000000
    12" to 48"0000000000000000000000000
    Replacement Square Head Lockbolts
    Image of Product. Front orientation. Square Head Lockbolts. Starrett High-Accuracy Combination Square Heads.
    For Head Style
    For Blade Lg.
    Each
    Center, Square4"0000000000000
    Center, Square6"000000000000
    Center6"000000000000
    Center, Square, Protractor12" to 36"/300 mm to 600 mm00000000000
    Protractor Heads
    Image of Product. Front orientation. Combination Square Heads. Starrett High-Accuracy Combination Square Heads, Protractor Heads.
    Protractor heads measure angles.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Protractor
    Cast Iron
    For Blade
    Lg.
    Reversible
    Features
    Angle Measured
    Range
    Graduations (Numeric
    Increments)
    Each
    12" to 48"NoBuilt-In Level0° to 180°1° (10°)00000000000000
    12" to 48"YesBuilt-In Level0° to 180°1° (10°)0000000000000
    Replacement Square Head Lockbolts
    Image of Product. Front orientation. Square Head Lockbolts. Starrett High-Accuracy Combination Square Heads.
    For Head Style
    For Blade Lg.
    Each
    Center, Square, Protractor12" to 36"/300 mm to 600 mm000000000000

    High-Accuracy Combination Square Heads

    Attach to High-Accuracy Combination Square Blades with the included lockbolts.
    Square Heads
    Image of Product. Front orientation. Combination Square Heads. High-Accuracy Combination Square Heads, Square Heads.
    Square heads check 90° angles.
    Zinc Alloy—Zinc alloy heads are lightweight and corrosion resistant.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
    Combination
    Square Heads
    Replacement Square
    Head Lockbolts
    For Blade
    Lg.
    Features
    Each
    Each
    Zinc Alloy
    12" to 24"Built-In Level000000000000000000000000000
     
    Cast Iron
    12" to 24"Built-In Level0000000000000000000000000
     
    Hardened Cast Iron
    12" to 24"Built-In Level0000000000000000000000000
     
    Center Heads
    Image of Product. Front orientation. Combination Square Heads. High-Accuracy Combination Square Heads, Center Heads.
    Center heads identify the center on pipes, rods, and shafts.
    Zinc Alloy—Zinc alloy heads are lightweight and corrosion resistant.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Hardened Cast Iron—Hardened cast iron heads are more durable and last longer than cast iron heads.
    Combination
    Square Center Heads
    Replacement Square
    Head Lockbolts
    For Blade
    Lg.
    Each
    Each
    Zinc Alloy
    12" to 24"000000000000000000000000000
     
    Cast Iron
    12" to 24"0000000000000000000000000
     
    Hardened Cast Iron
    12" to 24"0000000000000000000000000
     
    Protractor Heads
    Image of Product. Front orientation. Combination Square Heads. High-Accuracy Combination Square Heads, Protractor Heads.
    Protractor heads measure angles.
    Zinc Alloy—Zinc alloy heads are lightweight and corrosion resistant.
    Cast Iron—Cast iron heads are durable, so they resist dents and scratches. However, they corrode more easily than zinc alloy heads.
    Combination Square Protractor Heads
    Replacement Square
    Head Lockbolts
    Protractor
    For Blade
    Lg.
    Reversible
    Angle Measured
    Range
    Graduations (Numeric
    Increments)
    Each
    Each
    Zinc Alloy
    12" to 24"Yes0° to 180°1° (10°)0000000000000000000000000000
     
    Cast Iron
    12" to 24"Yes0° to 180°1° (10°)0000000000000000000000000
     

    High-Accuracy Combination Squares

    Use these squares in place of your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading.
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Hardened Cast Iron Square Head—Hardened cast iron square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Cast
    Iron Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"000000000000000000000000000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt0000000000000
    Blades with Square Head with Built-In Level, Center Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber.
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Cast Iron Square Head—Hardened cast iron square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Cast
    Iron Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"000000000000000000000000000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt0000000000000
    Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber.
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Squares. High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Hardened Cast Iron Square Head—Hardened cast iron square heads are more durable and last longer than cast iron square heads.
    Satin Blade—Satin blade appearance is corrosion resistant and reduces glare.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Hardened Cast
    Iron Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Appearance
    Color
    Color
    Type
    Head
    Lg.
    Each
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SteelSatinChrome, SilverBlackEtched4 1/2"000000000000000000000000000000
     
    Replacement Square Head Lockbolts
    Each
    Replacement Lockbolt0000000000000

    High-Accuracy Combination Square Blades

    Image of Product. Front orientation. Contains Annotated, MultipleImages. Combination Square Blades. High-Accuracy Combination Square Blades.
    Blades are for use with High-Accuracy Combination Square Heads. Blades are labeled with numeric increments that are less than 1" for quick-reading. All have a corrosion-resistant satin chrome-plated finish that reduces glare and wear-resistant etched markings.
    Graduation
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Color
    Color
    Type
    Each
    Inch
     
    Satin Chrome-Plated Steel
    6"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"3/4"5/64"SilverBlackEtched00000000000000
    6"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0025" to 0.0025"3/4"5/64"SilverBlackEtched0000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SilverBlackEtched0000000000000
    12"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0025" to 0.0025"1"3/32"SilverBlackEtched0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SilverBlackEtched0000000000000
    18"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0025" to 0.0025"1"3/32"SilverBlackEtched0000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.0025" to 0.0025"1"3/32"SilverBlackEtched00000000000000
    24"1/32" (4/32"), 1/64" (8/64")1/50" (1/10"), 1/100" (1/10")-0.0025" to 0.0025"1"3/32"SilverBlackEtched00000000000000
     

    Heavy Duty Combination Squares

    Built for welding and other heavy duty fabricating jobs, these squares have an extra-wide head and a large thumbwheel, so they’re easy to adjust and hold while wearing gloves. They combine the functionality of a try square, miter square, depth gauge, marking gauge, 90° level, and ruler in one tool. Add a clamp to the extra-wide head or use the included leveling tabs to hold material while welding. The tabs can also be used to set workpieces level to one another before fabricating. The fully recessed blade makes it easy to measure around obstacles.
    Blades with Square Head with Built-In Level and Leveling Tabs
    Image of Product. Front orientation. Contains Annotated. Squares. Heavy Duty Combination Squares, Blades with Square Head with Built-In Level and Leveling Tabs.
    Image of Product. Front orientation. Contains Annotated. Squares. Heavy Duty Combination Squares, Blades with Square Head with Built-In Level and Leveling Tabs, Inch.

    Inch

    Square head checks 90° angles.
    Cast Iron Square Head—Squares with a cast iron head are durable and resist both scratches and dents. However, they’re more prone to corrosion than squares with zinc alloy heads.
    Aluminum Square Head—Squares with an aluminum head are lightweight and resist corrosion.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Aluminum
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Flange
    Thk.
    Head
    Lg.
    Each
    Each
    Inch
    12"1/8" (1"), 1/16" (1")1/8" (1"), 1/16" (1")1"7/64"Stainless SteelGoldBlackEtched2"5"0000000000000000000000000000
     

    Scratch-Resistant High-Accuracy Combination Squares

    A titanium coating protects the blade against scratches and wear. Use these squares to replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. Blades are labeled with numeric increments that are less than 1" for quick reading.
    Blades with Square Head with Built-In Level and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber.
    Image of Product. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.002"1"3/32"Titanium-Coated SteelGoldBlackEtched4 1/2"000000000000000
     
    Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber
    Image of Product. Front orientation. Contains Annotated. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber.
    Image of Product. Front orientation. ZoomedIn view. Contains Annotated, MultipleImages. Squares. Scratch-Resistant High-Accuracy Combination Squares, Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber, Inch.

    Inch

    Square head checks 90° angles.
    Protractor head measures angles.
    Center head identifies the center on pipes, rods, and shafts.
    Etched—Etched graduation marks are wear resistant.
    Blade
    Graduation
    Cast Iron
    Square Head
    Blade
    Lg.
    Front Graduations (Numeric
    Graduations)
    Back Graduations (Numeric
    Graduations)
    Lg. Accuracy
    Wd.
    Thk.
    Material
    Color
    Color
    Type
    Head
    Lg.
    Each
    Inch
    12"1/32" (4/32"), 1/64" (8/64")1/8" (1"), 1/16" (1")-0.002" to 0.002"1"3/32"Titanium-Coated SteelGoldBlackEtched4 1/2"000000000000000
     

    Mitutoyo Squareness Gauges

    Image of Product. Front orientation. Squareness Gauges. Mitutoyo Squareness Gauges.
    Ensure parts are perfectly straight and square—these gauges detect surface deviations so small the human eye can’t see them. As you slide the lever on these gauges up and down, a dial test indicator moves along the vertical surface of your workpiece, measuring how straight and square it is. Checking for slight angles on machined parts or frames verifies they will align properly and function correctly. You can adjust the squareness of the gauges to fine-tune for differences in temperature and humidity and to maintain precision over years of use. Measure an object for height with the scale along the side of the gauge. The housing is cast iron, so the gauges are stable and stand up to frequent use.
    Material
    Base
    Distance Measured
    Range, mm
    Accuracy
    Measuring Increments,
    mm
    Squareness
    Tolerance, mm
    Straightness
    Tolerance, mm
    Housing
    Column
    Lg.
    Wd.
    Includes
    Mfr. Model
    No.
    Each
    0 to 150±0.003 mm0.0020.0030.002Cast IronAluminum
    		7"4"Dial Indicator, Micrometer311-2150000000000000000
    0 to 250±0.003 mm0.0020.0090.0035Cast IronAluminum
    		7"4"Dial Indicator, Micrometer311-225000000000000000
    0 to 450±0.003 mm0.0020.0060.0025Cast IronAluminum
    		7"4"Dial Indicator, Micrometer311-245000000000000000
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