The Big 12? is seven tools in one like a framing square, try square, miter square, protractor, saw guide, stair gauge and out-of-square corner angle finder. It's constructed of heavy-gauge aluminum 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.
Manufacturer: SWANSON TOOL Model Number: S0107 UPC: 038987001079
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