Layout Squares | McMaster-Carr

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227 Products

Combination Squares

Replace your try square, miter square, depth gauge, marking gauge, 90° level, ruler, and scriber with one tool.

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.

Starrett High-Accuracy Combination Square Blades

Use these blades with Starrett High-Accuracy Combination Square Heads. They meet Fed. Spec. GGG-R-791H, which establishes uniform standards for accuracy, graduations, and size.

Starrett High-Accuracy Combination Square Heads

Attach to Starrett High-Accuracy Combination Square Blades with the included lockbolts.

High-Accuracy Combination Square Heads

Attach to High-Accuracy Combination Square Blades with the included lockbolts.

High-Accuracy Combination Square Blades

Blades are for use with High-Accuracy Combination Square Heads.

High-Accuracy Combination Squares

Use these squares in place of your try square, miter square, depth gauge, height gauge, center-point finder, and level.

Scratch-Resistant High-Accuracy
Combination Squares

A titanium coating protects the blade against scratches and wear.

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.

Squares

High-Accuracy Squares

Ensure reliable, repeatable angles.

High-Accuracy Square Sets

Ensure reliable, repeatable angles.

Squares with Graduations on Both Blades

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

Laser Squares

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

Squares

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

Squares with Adjustable Blade

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

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.

Easy-to-Read Squares with
Graduations on Both Blades

Large numbers and dark graduations on both blades make it easy to read horizontal and vertical measurements.

Angle Squares

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

Welding Squares

Position your workpieces at the correct angle prior to welding.

Pipefitters' Squares

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

Layout Marking and Drafting Tools

Straightedges

Use these highly accurate straightedges as a guide to scribe and cut straight lines and to check surface straightness.

T-Squares

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

Folding Triangle Straightedges

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

Triangle Straightedges/Protractors

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

Triangle Straightedges

Mark and cut straight lines or 90° angles.

Straightedges with Graduations

Highly accurate, these straightedges work as a guide to scribe and cut straight lines and to check surface straightness. They have graduations, so you can take measurements as you go.

Angle Transfers

Duplicate or transfer any angle.

Multi-Angle Transfers

Transfer multiple angles, draw parallel lines, or create a template to make repeated patterns and measurements.