Speed Squares, 7 3/16 in x 7 in, 1/8 in, Black, Aluminum

Features: This unique tool is actually five tools in one: a tri-square, a miter square, a protractor, a line scriber, and a saw guide | 1/4" spaced notches to facilitate scribing lines | 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 | 5 tools in one: try square, miter square, protractor, line scriber and saw guide | Includes the new Diamond feature that makes layout work and seat cuts on common rafters easy | 1/4" spaced notches to facilitate scribing lines | Black filled markings and blue book