Amazon.com Product Description
The Swanson Speed Square is made of heavy-gauge aluminum alloy with black gradations for easy reading and a matte finish to prevent glare. This 5-in-1 tool easily transitions from try square to miter square, protractor, line scriber, or saw guide, and includes 1/4-inch spaced notches to facilitate scribing lines. Each speed square comes with a Swanson Blue Book instruction manual and a 1-year limited manufacturer's warranty.
Product Description
Tool for fast, accurate layout and cutting of angles for rafters, bracing, trim, cabinets and general wood work. It's a framing/try/miter square, saw guide plus protractor. One-number (roof pitch) reference is used for both common and hip-valley rafter scales. Includes pocket-size booklet that explains basic roof. Construction with diagrams, roof formulas, rafter tables and conversion charts. Aluminum alloy construction. 7" x 7" overall size.