Swanson S0107 "Big 12" Speed Square Rafter Square 7-In-1 Tool

• Ideal for deck construction, stairway layout and for use with large materials
• Heavy-guage aluminum, Black gradations for easier reading
• Layout bar for out-of-square corners and exterior step stringers
• Matte finish to prevent glare, Instruction book included
• 1/4" spaced notches to facilitate scribing lines

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. 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 of Rafter Length and Roof Construction, and Layout Bar and hardware.