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.