Features and Benefits:•Solid aluminum extruded square will not bend or break•Aluminum will not rust or corrode•Includes conversion tables that are stamped•If sawing is required, the edge is thicker for safetyThe Empire 2990 7 in. Heavy duty Magnum™ rafter square features a solid aluminum extruded square that will not bend or break. Stamped conversion tables allow for quick and easy measurements. The thick edge makes for a safer saw guide and aluminum material will not rust or corrode.