2107A53 | Starrett High-Accuracy Combination Square

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Numeric Graduations

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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115 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


	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 mm	1/32" (8/32"), 1 mm (10 mm)	1 mm (10 mm), 1/16" (1")	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 9/16"	2007A7	00000

Blades with Square Head with Built-In Level and Scriber


	Inch/Metric

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 Steel	Silver	Black	Etched	3 11/16"	2007A5	000000


		12"	1/16" (1"), 1/32" (1")	1/8" (1"), 1/16" (1")	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 5/8"	2007A9	00000
		16"	1/16" (1"), 1/32" (1")	1/8" (1"), 1/16" (1")	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 5/8"	2007A6	00000


		Inch/Metric



				12"/300 mm	1/32" (8/32"), 1 mm (10 mm)	1 mm (10 mm), 1/16" (1")	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 5/8"	2007A111	00000


				16"/400 mm	1/32" (8/32"), 1 mm (10 mm)	1 mm (10 mm), 1/16" (1")	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 3/4"	2007A113	00000
				6"/150 mm	1/32" (8/32"), 1 mm (10 mm)	1 mm (10 mm), 1/16" (1")	13/16"	5/64"	Stainless Steel	Silver	Black	Etched	3 11/16"	2007A112	00000


				Metric



						150 mm	1 mm (10 mm), 1 mm (10 mm)	1 mm (10 mm), 1 mm (10 mm)	13/16"	5/64"	Stainless Steel	Silver	Black	Etched	3 11/16"	2007A31	00000


						300 mm	1 mm (10 mm), 1 mm (10 mm)	1 mm (10 mm), 1 mm (10 mm)	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 5/8"	2007A41	00000
						400 mm	1 mm (10 mm), 1 mm (10 mm)	1 mm (10 mm), 1 mm (10 mm)	1"	3/32"	Stainless Steel	Silver	Black	Etched	4 5/8"	2007A51	00000

Blades with Square Head, Angle Finder, and Scriber


	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 mm	0° to 90°	1 mm (10 mm), 1/32" (4/32")	1 mm (10 mm), 1/16" (1")	1"	5/64"	Steel	Silver	Black	Etched	4"	2004A11	000000

Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head with Built-In Level, and Scriber


	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 mm	1 mm (10 mm), 1/32" (4/32")	1 mm (10 mm), 1/16" (1")	1"	3/32"	Steel	Silver	Black	Etched	4 1/4"	2007A8	000000

High-Accuracy Squares

Ensure reliable, repeatable angles.

			Blade
	Angle Measured	Blade Lg.	Wd.	Thk.	Min. Lg. Accuracy	Color		Each
Inch







				Steel

				90°	2" × 2"	3/4" × 3/4"	1/16" × 3/8"	0.0006"	Silver	2278A25	000000


				90°	3" × 2 3/8"	3/4" × 3/4"	1/16" × 3/8"	0.0006"	Silver	2278A22	00000
				90°	4" × 3"	3/4" × 3/4"	1/16" × 3/8"	0.0006"	Silver	2278A11	00000
				90°	6" × 4"	1" × 1"	1/8" × 1/2"	0.0006"	Silver	2278A14	00000
				90°	9 1/4" × 6 5/16"	1 1/4" × 1 1/4"	1/8" × 11/16"	0.0009"	Silver	2278A17	00000
				90°	12" × 8"	1 1/2" × 1 1/2"	3/32" × 3/4"	0.002"	Silver	2278A21	00000
				90°	18" × 10"	2" × 2"	1/8" × 1"	0.004"	Silver	2278A23	000000
				90°	24" × 12"	2 1/2" × 2 1/2"	1/8" × 1 1/4"	0.004"	Silver	2278A24	000000

Angle Squares

Also known as rafter squares, these have a 0° to 90° scale for measuring angles. All squares have a rafter scale and saw guide.

Anodized Aluminum and Powder-Coated Aluminum—Aluminum squares are durable and work in most applications.

Plastic—Plastic squares are useful on delicate surfaces to prevent marring, but they’re less durable than aluminum squares.

Drill Guide—Squares with a drill guide help you drill precise holes spaced at _3/8”.

Layout Bar—Squares with a layout bar let you fit out-of-square corners when you adjust the square using the bar.

	Back Graduations (Numeric Graduations)	Thk.	Color	Graduation Color	Measuring Features	Includes		Each
Inch







	Anodized Aluminum

	90°	4 1/2" × 4 1/2"	1/8" (1")	—	1/8"	Black	White	—	—	1960A23	000000


	90°	4 1/2" × 4 1/2"	1/8" (1")	1/8" (1")	3/16"	Silver	Black	Drill Guide	—	1960A103	00000
	90°	7" × 7"	1/8" (1")	—	3/16"	Black	White	Magnet	—	1960A22	00000
	90°	12" × 12"	1/4" (1")	1/4" (1")	3/16"	Silver	Black	—	Layout Bar	1960A102	00000




			Powder-Coated Aluminum

			90°	7" × 7"	1/8" (1")	—	3/16"	Silver	Silver	—	—	1960A17	00000


			90°	12" × 12"	1/8" (1")	—	3/16"	Silver	Silver	—	—	1960A19	00000




					Plastic

					90°	7" × 7"	1/8" (1")	—	7/32"	Blue	Blue	—	—	1960A65	0000


					90°	8" × 8"	1/8" (1")	1/8" (1")	3/16"	Gray	Gray	Level	—	1960A105	0000
					90°	12" × 12"	1/8" (1")	—	7/32"	Blue	Blue	—	—	1960A68	00000


					Metric







									Anodized Aluminum

									90°	18 cm × 18 cm	0.5 cm (1 cm)	—	3/16"	Black	White	—	—	1960A21	00000


									90°	25 cm × 25 cm	0.5 cm (1 cm)	0.5 cm (1 cm)	3/16"	Silver	Silver	—	—	1960A101	00000

Squares with 2 Graduated Blades

Also known as carpenters’ and framing squares, these have graduations on both blades for horizontal and vertical measurements.

Squares—Inch

Image of Product. Front orientation. Contains Annotated. Squares. Squares with 2 Graduated Blades.

					Graduation
Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Material	Color	Color	Type		Each
12" × 8"	1/8" (1"), 1/8" (1"), 1/8" (1"), 1/8" (1")	1/8" (1"), 1/8" (1"), 1/8" (1"), 1/8" (1")	Epoxy-Coated Steel	Silver	Silver	Printed	2364A76	00000
12" × 8"	1/16" (1"), 1/16" (1"), 1/16" (1"), 1/16" (1")	1/16" (1"), 1/16" (1"), 1/16" (1"), 1/16" (1")	Zinc-Plated Steel	Silver	Silver	Embossed	2364A75	0000
24" × 16"	1/8" (1"), 1/8" (1"), 1/8" (1"), 1/8" (1")	1/8" (1"), 1/8" (1"), 1/8" (1"), 1/8" (1")	Epoxy-Coated Steel	Silver	Silver	Printed	2364A65	00000

Squares—Inch/Metric

					Graduation
Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Material	Color	Color	Type		Each
12" (30 cm) × 8" (20 cm)	1/8" (1"), 1/8" (1"), 1/8" (1"), 1/8" (1")	1 mm (20 mm), 1 mm (20 mm), 1 mm (20 mm), 1 mm (20 mm)	Epoxy-Coated Steel	Silver	Silver	Printed	2364A11	000000
24" (600 mm) × 16" (400 mm)	1/8" (1"), 1/8" (1"), 1/8" (1"), 1/8" (1")	2 mm (2 cm), 2 mm (2 cm), 2 mm (2 cm), 2 mm (2 cm)	Epoxy-Coated Steel	Silver	Silver	Printed	2364A12	00000

Squares with Rafter Framing Tables—Inch

Squares with rafter framing tables are also known as rafter squares.

Etched—Etched graduation marks are wear resistant.

					Graduation
Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Material	Color	Color	Type		Each
24" × 16"	1/12" (1"), 1/16" (1"), 1/12" (1"), 1/10" (1")	1/16" (1"), 1/8" (1"), 1/16" (1"), 1/8" (1")	Aluminum	Silver	Silver	Printed	2006A67	000000
24" × 16"	1/12" (1"), 1/16" (1"), 1/12" (1"), 1/10" (1")	1/16" (1"), 1/8" (1"), 1/8" (1"), 1/16" (1")	Lacquer-Coated Steel	Silver	Black	Printed	2006A14	00000
24" × 16"	1/16" (1"), 1/8" (1"), 1/8" (1"), 1/16" (1")	1/12" (1"), 1/16" (1"), 1/10" (1"), 1/12" (1")	Aluminum	Blue	White	Etched	2006A21	00000

Squares with Rafter Framing Tables—Metric

Squares with rafter framing tables are also known as rafter squares.

Etched—Etched graduation marks are wear resistant.

					Graduation
Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Material	Color	Color	Type		Each
600 mm × 400 mm	2 mm (10 mm), 2 mm (10 mm), 2 mm (10 mm), 2 mm (10 mm)	2 mm (10 mm), 2 mm (10 mm), 2 mm (10 mm), 2 mm (10 mm)	Aluminum	Blue	White	Etched	2364A14	000000

Easy-Read Squares with 2 Graduated Blades

Large numbers and dark graduations on both blades make it easy to read horizontal and vertical measurements. These squares are also known as carpenters’ and framing squares.

Squares—Inch

Image of Product. Front orientation. Contains Annotated. Squares. Easy-Read Squares with 2 Graduated Blades.

					Graduation
Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Material	Color	Color	Type		Each
12" × 8"	1/16" (1"), 1/16" (1"), 1/16" (1"), 1/16" (1")	1/16" (1"), 1/16" (1"), 1/16" (1"), 1/16" (1")	Steel	Silver	Black	Printed	5488N11	00000

Squares with Rafter Framing Tables—Inch

Squares with rafter framing tables are also known as rafter squares.

					Graduation
Blade Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Material	Color	Color	Type		Each
24" × 16"	1/12" (1"), 1/16" (1"), 1/12" (1"), 1/10" (1")	1/16" (1"), 1/8" (1"), 1/8" (1"), 1/16" (1")	Steel	Silver	Black	Printed	5488N12	000000

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


	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"	Steel	Satin	Chrome, Silver	Black	Etched	2 1/4"	2108A21	0000000	2107A21	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt for Square and Center Heads	1955A81	000000

Blades with Square Head and Center Head


	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"	Steel	Satin	Chrome, Silver	Black	Etched	2 1/4"	2108A11	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt for Square and Center Heads	1955A81	000000

Blades with Square Head with Built-In Level and Scriber


	Inch/Metric

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	—	Silver	Black	Etched	2 13/32"	2108A44	0000000	—	———	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"	Steel	Satin	Chrome, Silver	Black	Etched	2 13/32"	2108A22	000000	2 13/32"	2107A22	0000000
		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"	Steel	Satin	Chrome, Silver	Black	Etched	2 13/32"	2108A28	000000	2 13/32"	2107A28	000000
		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	2108A45	000000	—	———	0
		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	2108A23	000000	3 5/8"	2107A23	000000
		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	Satin	Chrome, Silver	Black	Etched	4 1/2"	2108A29	000000	3 5/8"	2107A29	000000
		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	2108A25	000000	3 5/8"	2107A25	000000
		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"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A32	000000


		Inch/Metric



				11 3/4"/300 mm	0.5 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	Satin	Chrome, Silver	Black	Etched	4 1/2"	2108A26	000000	3 5/8"	2107A26	000000

Replacements for Squares

		Each
Replacement Case for Combination Squares with 12" Long Blade	4264N11	0000000
Replacement Lockbolt for Square and Center Heads	1955A82	00000
Replacement Lockbolt for Square, Center, and Protractor Heads	1955A83	0000

Blades with Square Head with Built-In Level, Center Head, and Scriber


	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"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	2 13/32"	2107A12	0000000


		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	2108A13	0000000	3 5/8"	2107A13	000000

Replacements for Squares

		Each
Replacement Case for Combination Squares with 12" Long Blade	4264N11	0000000
Replacement Lockbolt for Center Heads	1955A85	00000
Replacement Lockbolt for Square and Center Heads	1955A82	00000
Replacement Lockbolt for Square, Center, and Protractor Heads	1955A83	0000

Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber


	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"	Steel	Silver	Black	Etched	4 1/2"	2108A57	0000000


		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	2108A59	000000

Replacements for Squares

Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber


	Inch/Metric

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	—	Silver	Black	Etched	4 1/2"	2108A51	0000000	—	———	0


		12"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.005"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A51	0000000
		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	—	Silver	Black	Etched	4 1/2"	2108A54	000000	—	———	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"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A54	000000
		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	2108A53	000000	—	———	0
		24"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.007"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A53	000000
		Starrett High-Accuracy Combination Square with Steel Head, Reversing Protractor, 24" Chrome Steel Blade, 16ths Graduations Product Detail QuantityEachIn stock
		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"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A56	000000


		Inch/Metric



				11 3/4"/300 mm	0.5 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	—	Silver	Black	Etched	4 1/2"	2108A55	000000	—	———	0


				11 3/4"/300 mm	0.5 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	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	2107A57	000000

Replacements for Squares

T-Profile Squares


Plastic Head	Aluminum Head

Draw and cut straight lines in drafting, graphics, and construction applications.

			Blade		Head		Graduations
	Head Material	Blade Lg.	Wd.	Material	Lg.	Wd.	Blade	Head		Each
Inch



		Plastic	24"	2"	Aluminum	20"	3"	1/16"	1/16"	8464T1	000000


		Aluminum	48"	2"	Aluminum	22"	1 1/2"	1/8"	1/8"	9444T11	00000

High-Accuracy Square Sets

Ensure reliable, repeatable angles.

		Blade
	Blade Lg.	Wd.	Thk.	Min. Lg. Accuracy	Color	Case Material	No. of Pieces		Each
Inch







				Steel

				2" × 2" 3" × 2 3/8" 4" × 3" 6" × 4"	3/4" × 3/4" 3/4" × 3/4" 3/4" × 3/4" 1" × 1"	1/16" × 3/8" 1/16" × 3/8" 1/16" × 3/8" 1/16" × 7/16"	0.0006" 0.0006" 0.0006" 0.0006"	Silver	Plastic	4	2278A31	000000


				4" × 3" 6" × 4" 9" × 6" 12" × 8"	3/4" × 3/4" 1" × 1" 1 1/4" × 1 1/4" 1 1/2" × 1 1/2"	1/16" × 11/32" 1/16" × 7/16" 3/32" × 3/4" 3/32" × 3/4"	0.0008" 0.0008" 0.0010" 0.0010"	Silver	Plastic	4	2278A32	000000

Pipefitting Squares

Square with Optional Square Holder

Pipe fitting sizes and welding charts are shown on this square in wear-resistant etched graduations.

						Blade			Graduation
	Angle Measured	Blade Lg.	For Pipe Size	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Wd.	Thk.	Color	Color	Type	Measuring Features		Each
Inch







				Stainless Steel

				90°	24" × 15 3/8"	1, 1 1/2, 2, 2 1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24	1/16" (1"), 1/16" (1")	1/12" (1"), 1/12" (1")	2 3/16" × 1 9/16"	1/16" × 1/16"	Silver	Black	Etched	Bolt Chart, Chart for 150-Lb. Weld Neck Flanges, Chart for 300-Lb. Weld Neck Flanges, Chart for 45° Weld Elbows, Chart for Diameter of 150-Lb. Pipe Blinds, Chart for Diameter of 300-Lb. Pipe Blinds, Chart for OD of 150-Lb. Flanges, Chart for OD of 300-Lb. Flanges, Chart for Weld Tees	1946A25	0000000

Square Holders

	For Min. Pipe Dia.	Max. Magnetic Pull, lbf	No. of Magnets	Lg.	Wd.	Ht.
Aluminum


1"	25	2	8 1/4"	2 1/4"	7 1/2"	8990A61	0000000

Laser Squares

Lay out machine tables and work stations at precise right angles. This laser generates two red lines that form a 90° angle. The laser lines are best viewed indoors.

						Overall			No. of Vials
	Angle Measured	Accuracy	Max. Laser Distance, ft.	Line Size @ Distance	Laser Class	Lg.	Wd.	Ht.	Horizontal	Vertical	Sensitivity	Batteries Included	Features		Each
Inch



		0° to 90°	±1/4" @ 20 ft.	23	0.1" @ 20 ft.	FDA Class II	6 1/2"	6 1/2"	2"	1	1	0.004"/1 ft., 1 min/0.1"	Yes	Built-In Protractor	2019A35	000000

Starrett High-Accuracy Squares

These squares meet Fed. Spec. GGG-S-656-E, which establishes uniform standards for square accuracy to ensure reliable, repeatable angles.

	Squares								Measuring Square Cases
			Blade
	Angle Measured	Blade Lg.	Wd.	Thk.	Min. Lg. Accuracy	Color		Each		Each
Inch







				Steel

				90°	1 1/2" × 1 1/2"	1/2" × 17/32"	3/64" × 1/4"	0.0001"	Silver	2275A12	0000000	2275A13	000000


				90°	3" × 2 3/8"	47/64" × 7/8"	1/16" × 13/32"	0.0001"	Silver	2275A14	000000	2275A15	00000
				90°	4 1/2" × 3 1/2"	1 1/8" × 15/16"	23/32" × 1/2"	0.0001"	Silver	2275A16	000000	2275A17	00000
				90°	6" × 4 5/16"	1 5/16" × 1 1/16"	5/64" × 1/2"	0.0001"	Silver	2275A18	000000	2275A19	00000
				90°	12" × 7"	2" × 1 31/64"	5/64" × 3/4"	0.0002"	Silver	2275A24	00000000	2275A26	000000

Squares with Adjustable Blade


With Beveled Blade	Without Beveled Blade

Measure and mark material exactly where you need to with a sliding blade.

Etched—Etched graduation marks are wear resistant.

Satin—Satin blade appearance is corrosion resistant and reduces glare.

Beveled Blade—30°, 45°, and 90° squares include a separate beveled blade for measuring 30° and 45° angles.

						Blade			Graduation
	Angle Measured	Blade Lg.	Handle Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Wd.	Thk.	Color	Color	Type	Handle Material	Appearance	Includes		Each
Inch







				Chrome-Plated Steel

				30°, 45°, 90°	4"	2 1/2"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	3/4"	3/32"	Silver	Black	Etched	Cast Iron	Satin	Beveled Blade	8606A55	000000


				30°, 45°, 90°	6"	2 1/2"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	3/4"	3/32"	Silver	Black	Etched	Cast Iron	Satin	Beveled Blade	8606A57	00000
				90°	4"	2 1/2"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	3/4"	3/32"	Silver	Black	Etched	Cast Iron	Satin	—	8606A54	00000
				90°	6"	2 1/2"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	3/4"	3/32"	Silver	Black	Etched	Cast Iron	Satin	—	8606A56	00000

Replacement Square Head Lockbolts

Squares


	Inch	Metric

Also known as try squares, these are square inside and out for checking and marking angles.

Etched—Etched graduation marks are wear resistant.

						Blade			Graduation
	Angle Measured	Blade Lg.	Handle Lg.	Front Graduations (Numeric Graduations)	Back Graduations (Numeric Graduations)	Wd.	Thk.	Color	Color	Type	Handle Material	Measuring Features		Each
Inch







				Stainless Steel

				45°, 90°	8"	5 1/4"	1/8" (1"), 1/8" (1")	1/8" (1"), 1/8" (1")	1 1/2"	1/16"	Silver	Silver	Printed	Plastic	Level	8994A82	00000


				90°	8"	5 3/8"	1/16" (1"), 1/8" (1")	1/16" (1"), 1/8" (1")	1 1/2"	1/16"	Silver	Black	Etched	Wood	—	8994A64	00000


				Metric







								Stainless Steel

								90°	200 mm	5 1/4"	1 mm (20 mm), 1 mm (20 mm)	1 mm (20 mm), 1 mm (20 mm)	1 1/2"	1/16"	Silver	Blue	Printed	Aluminum	—	8994A86	00000

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


	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 Steel	Gold	Black	Etched	2"	5"	4998N12	0000000	4998N11	0000000

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


	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"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	21115A14	0000000	21115A18	0000000

Replacement Square Head Lockbolts

Blades with Square Head with Built-In Level, Center Head, and Scriber


	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"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	21115A13	0000000	21115A17	0000000

Replacement Square Head Lockbolts

Blades with Square Head with Built-In Level, Center Head, Reversible Protractor Head, and Scriber


	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"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	21115A11	0000000	21115A15	0000000

Replacement Square Head Lockbolts

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


	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 Steel	Gold	Black	Etched	4 1/2"	21155A34	0000000

Blades with Square Head with Built-In Level, Center Head, Protractor Head, and Scriber


	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 Steel	Gold	Black	Etched	4 1/2"	21155A36	0000000