Swanson Big 12 Speed Square with Layout Bar
The Big 12 is seven tools in one: a framing square try square mitre square protractor saw guide stair gauge and out-of-square corner angle finder. It's constructed of heavy-gauge aluminium alloy and includes the Layout Bar for use in determining out-of-square corners. Also included are the Swanson Blue Book for roof and stairway layout and Layout Bar with hardware.
Internal Reference:
SWAS0107
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