The Big 12 is seven tools in one: a framing square, try square, miter square, protractor, saw guide, stair gauge, and out-of-square corner angle finder. The 12" body covers larger materials, making it well suited for stair layout and rafter work.

• Constructed of heavy-gauge aluminum alloy
• Matte finish to prevent glare
• 12" body to cover larger materials
• Includes Layout Bar with hardware for finding out-of-square corners
• Packaged with the 60-page Swanson Blue Book of Rafter Length and Roof Construction
• Useful for laying out steps and stairs

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