Square Sets | McMaster-Carr

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71 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"	000000	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 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"	000000	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"	000000	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"	000000	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"	00000000	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"	00000000	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"	00000000	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"	0000000	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"	0000000	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"	0000000	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 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"	0000000	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"	000000	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"	0000000	0000000	0000000	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt for Square and Center Heads	0000000	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"	0000000	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt for Square and Center Heads	0000000	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"	0000000	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"	0000000	000000	2 13/32"	0000000	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"	0000000	000000	2 13/32"	0000000	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"	0000000	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"	0000000	000000	3 5/8"	0000000	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"	0000000	000000	3 5/8"	0000000	000000
		18"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.006"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	4 1/2"	0000000	000000	3 5/8"	0000000	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"	0000000	000000	3 5/8"	0000000	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"	0000000	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"	0000000	000000	3 5/8"	0000000	000000


				23 1/2"/600 mm	0.5 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	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	0000000	000000

Replacements for Squares

		Each
Replacement Case for Combination Squares with 12" Long Blade	0000000	000000
Replacement Lockbolt for Square and Center Heads	0000000	00000
Replacement Lockbolt for Square, Center, and Protractor Heads	0000000	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"	0000000	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"	0000000	0000000	3 5/8"	0000000	000000

Replacements for Squares

		Each
Replacement Case for Combination Squares with 12" Long Blade	0000000	000000
Replacement Lockbolt for Center Heads	0000000	00000
Replacement Lockbolt for Square and Center Heads	0000000	00000
Replacement Lockbolt for Square, Center, and Protractor Heads	0000000	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"	0000000	0000000


		18"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.006"	1"	3/32"	Steel	Silver	Black	Etched	4 1/2"	0000000	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"	0000000	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"	0000000	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"	0000000	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"	0000000	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"	0000000	000000
		18"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.006"	1"	3/32"	Steel	—	Silver	Black	Etched	4 1/2"	0000000	000000	—	———	0
		18"	1/32" (4/32"), 1/64" (8/64")	1/8" (1"), 1/16" (1")	-0.0035" to 0.006"	1"	3/32"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	0000000	000000
		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"	Steel	Satin	Chrome, Silver	Black	Etched	—	———	0	3 5/8"	0000000	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"	0000000	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"	0000000	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"	0000000	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"	0000000	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"	0000000	000000
				23 1/2"/600 mm	0.5 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	—	Silver	Black	Etched	4 1/2"	0000000	000000	—	———	0

Replacements for Squares

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"	00000000	0000000	00000000	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt	00000000	00000

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"	00000000	0000000	00000000	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt	00000000	00000

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"	00000000	0000000	00000000	0000000

Replacement Square Head Lockbolts

		Each
Replacement Lockbolt	00000000	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 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"	0000000	0000000	0000000	0000000

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"	00000000	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"	00000000	0000000

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 mm	0.002	0.003	0.002	Cast Iron	Aluminum	7"	4"	Dial Indicator, Micrometer	311-215	0000000	000000000
0 to 250	±0.003 mm	0.002	0.009	0.0035	Cast Iron	Aluminum	7"	4"	Dial Indicator, Micrometer	311-225	0000000	00000000
0 to 450	±0.003 mm	0.002	0.006	0.0025	Cast Iron	Aluminum	7"	4"	Dial Indicator, Micrometer	311-245	0000000	00000000