Five tools in one: a tri-square, a miter square, a protractor, a line scriber, and a saw guide. The Speed Square is constructed of durable heavy-gauge aluminum alloy. Includes markings for Swanson's One-Number Method of rafter layout, and is packaged with the Swanson Blue Book of Rafter Length and Roof Construction. Matte finish to prevent glare.

WARNING: This product is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.