90 Degree Angle Rulers | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Blade Length Blade Length

	Blade Width Blade Width

1 1/2"

	Material Material

Aluminum

Steel

Plastic

	Finish Finish

	Color Color

	Black
	Silver
	Blue

	Graduation Marks Graduation Marks

	Numeric Increments Numeric Increments

1/2°

1 cm

2 cm

	Thickness Thickness

	Graduation Mark Style Graduation Mark Style

Etched

Printed

Embossed

	Angle Measured Angle Measured

0°-90°

90°

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Head Material Head Material

Aluminum

Plastic

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Graduation Location Graduation Location

	Blade Graduation Marks Blade Graduation Marks

8ths

16ths

	Head Width Head Width

1 1/2"

	Head Length Head Length

20"

22"

	Blade Thickness Blade Thickness

1/16"

3/32"

1/8"

	Head Graduation Marks Head Graduation Marks

8ths

16ths

	Graduation Color Graduation Color

	Black
	Silver
	White

	Size Size

10"

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22 Products

Angle Squares

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

Inch
Blade Lg.	Front Graduation Marks (Numeric Increments)	Thick.	Color	Graduation Mark Style	Features	No. of Magnets		Each
Anodized Aluminum
4 1/2" × 4 1/2"	8ths (1")	1/8"	Black	Etched	Rafter Scales, Saw Guide	__	0000000	000000
7" × 7"	8ths (1")	3/16"	Black	Etched	Rafter Scales, Saw Guide	1	0000000	00000
Powder-Coated Aluminum
7" × 7"	8ths (1")	3/16"	Silver	Printed	Rafter Scales, Saw Guide	__	0000000	0000
12" × 12"	8ths (1")	3/16"	Silver	Printed	Rafter Scales, Saw Guide	__	0000000	00000
Plastic
7" × 7"	8ths (1")	7/32"	Blue	Embossed	Rafter Scales, Saw Guide	__	0000000	0000
12" × 12"	8ths (1")	7/32"	Blue	Embossed	Rafter Scales, Saw Guide	__	0000000	00000
Metric
Anodized Aluminum
18cm × 18cm	1/2 cm (1 cm)	3/16"	Black	Etched	Rafter Scales, Saw Guide	__	0000000	00000

Squares with Graduations on Both Blades

Also known as carpenters’ and framing squares, these have graduations on both blades for horizontal and vertical measurements. Squares with rafter framing tables are also known as rafter squares.

Etched graduation marks are wear resistant.

Squares—Inch

	Front Graduation Marks (Numeric Increments)				Back Graduation Marks (Numeric Increments)						Graduation
Blade Lg.	Top	Bottom	Left	Right	Top	Bottom	Left	Right	Material	Color	Color	Mark Style		Each
12" × 8"	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	Epoxy-Coated Steel	Silver	Silver	Printed	0000000	00000
12" × 8"	16ths (1")	16ths (1")	16ths (1")	16ths (1")	16ths (1")	16ths (1")	16ths (1")	16ths (1")	Hardened Steel	Silver	Black	Embossed	0000000	0000
24" × 16"	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	8ths (1")	Epoxy-Coated Steel	Silver	Black	Printed	0000000	00000

Squares—Inch/Metric

	Front Graduation Marks (Numeric Increments)				Back Graduation Marks (Numeric Increments)						Graduation
Blade Lg.	Top	Bottom	Left	Right	Top	Bottom	Left	Right	Material	Color	Color	Mark Style		Each
12" (30 cm) × 8" (20 cm)	8ths (1")	8ths (1")	8ths (1")	8ths (1")	1 mm (20 mm)	1 mm (20 mm)	1 mm (20 mm)	1 mm (20 mm)	Epoxy-Coated Steel	Silver	Silver	Printed	0000000	00000
24" (600 mm) × 16" (400 mm)	8ths (1")	8ths (1")	8ths (1")	8ths (1")	2 mm (2 cm)	2 mm (2 cm)	2 mm (2 cm)	2 mm (2 cm)	Epoxy-Coated Steel	Silver	Black	Printed	0000000	00000

Squares with Rafter Framing Tables—Inch

	Front Graduation Marks (Numeric Increments)				Back Graduation Marks (Numeric Increments)						Graduation
Blade Lg.	Top	Bottom	Left	Right	Top	Bottom	Left	Right	Material	Color	Color	Mark Style		Each
24" × 16"	12ths (1")	16ths (1")	12ths (1")	10ths (1")	16ths (1")	8ths (1")	16ths (1")	8ths (1")	Aluminum	Silver	Silver	Printed	0000000	000000
24" × 16"	12ths (1")	16ths (1")	12ths (1")	10ths (1")	16ths (1")	8ths (1")	8ths (1")	16ths (1")	Lacquer-Coated Steel	Black	Silver	Etched	0000000	00000
24" × 16"	12ths (1")	16ths (1")	12ths (1")	10ths (1")	16ths (1")	8ths (1")	8ths (1")	16ths (1")	Lacquer-Coated Steel	Silver	Black	Etched	0000000	00000
24" × 16"	16ths (1")	8ths (1")	8ths (1")	16ths (1")	12ths (1")	16ths (1")	10ths (1")	12ths (1")	Aluminum	Blue	White	Etched	0000000	00000

Squares with Rafter Framing Tables—Metric

	Front Graduation Marks (Numeric Increments)				Back Graduation Marks (Numeric Increments)						Graduation
Blade Lg.	Top	Bottom	Left	Right	Top	Bottom	Left	Right	Material	Color	Color	Mark Style		Each
600mm × 400mm	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	0000000	000000

T-Squares

Plastic Head

Aluminum Head

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

	Blade			Head		Graduation Marks
Head Material	Lg.	Wd.	Material	Lg.	Wd.	Blade	Head		Each
Plastic	24"	2"	Aluminum	20"	3"	16ths	16ths	000000	000000
Aluminum	48"	2"	Aluminum	22"	1 1/2"	8ths	8ths	0000000	00000

Folding Triangle Straightedges

Unfold and lock the corners to form a triangle for marking angles.

Angle Measured	Unfolded Size	Wd.	Thick.	Material		Each
90°	36" × 48" × 60"	2"	3/8"	Aluminum	000000	000000

Triangle Straightedges/Protractors

A protractor and triangle in one, use these tools to quickly set any angle from 0° to 90°. They also measure slope and rise.

Size	Angle Measured	Numeric Increments		Each
8"	0°-90°	1/2°	0000000	000000
10"	0°-90°	1/2°	0000000	00000