Square Rulers | McMaster-Carr

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164 Products

Squares

Combination Squares

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

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

Starrett High-Accuracy Combination Square Heads

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

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.

High-Accuracy Combination Square Blades

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

High-Accuracy Combination Square Heads

High-Accuracy Combination Square Heads

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

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.

Squares with Graduations on Both Blades

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

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

High-Accuracy Squares

Ensure reliable, repeatable angles.

High-Accuracy Square Sets

High-Accuracy Square Sets

Ensure reliable, repeatable angles.

Laser Squares

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 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.

Angle Squares

Angle Squares

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

Pipefitters' Squares

Pipefitters' Squares

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

Transparent Rulers

Transparent Rulers

Keep your workpiece in view as you measure with these see-through rulers.

T-Squares

T-Squares

T-Squares

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)