Features a solid aluminum cast body with exclusive CNC machined edges, permanent molded gradations, and a low-glare, protective coat finish; thick edge is useful as a saw guide; continuous scribing notches ideal for ripping at 3-1/2" and 5-1/2". Can also be used as a ruler or can be used to measure angles. The diagonal edge has markings for laying out rafters, roof trim, and stair angles.