Speed Square 12"
Speed Square 12"
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Make layouts faster, cleaner, and more accurate with the Sawinery 12″ Speed Square. At 70% larger than standard 7″ speed squares, it’s the ideal layout tool for bigger boards, panels, and sheet goods where a smaller square just won’t cut it. The larger size keeps the reference edge flat and stable, giving you precise lines every time.
Crafted from solid precision-machined aluminum, this square is built to handle rough jobsite or shop use without losing accuracy. The high contrast labeling provides clearmeasuring for woodworking and construction. Mark perpendicular measurements,strike a line parallel with the edge or mark angles, even layout trusses forroofing, all with the same tool.
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Extra Large Size
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High-Contrast Markings
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Solid Aluminum Build

Highlights:
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Larger Coverage Area
Full 12″ length is 70% larger than 7" speed squares
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Check Corners Instantly
Quickly verify squareness and vertical alignment on large assemblies.
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Easy-Read Measurements
High-contrast markings stay visible and accurate while you work.
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Parallel Lines
Mark lines from 1” to 10”, parallel to the edge
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Full 0°–90° Angles
Provides layout measurements from 0 to 90 degrees
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Built to Last
Solid aluminum retains precision even under rough, repeated use.
Uses & Features
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Bigger for Better Accuracy
At 12", this Speed Square gives you far more reach than a standard 7" square — ideal for larger layouts.
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Make Lines at Any Angle
Mark accurate angles quickly and cleanly for layouts, cuts, or guides.
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Square Up Large Projects
Check and confirm that big panels or frames are perfectly square with ease.
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Large Layouts
Handle bigger projects with ease — the 12” size lets you mark long, straight lines across plywood and sheet goods with accuracy.
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Rafter Data at Your Fingertips
Built-in rafter conversion tables give you quick, reliable angle and cut information right on the square. No need to grab a separate chart.
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Verify Vertical Alignment
Ensure parts are standing perfectly upright and perpendicular to your work surface.


