Description Ideal for use as a saw guide, the 7" rafter square has an extra-thick aluminum body for heavy-duty use as well as stamped in contrasting color graduations for better readability. It also features a large base to provide grip on materials.Stamped-in contrasting color graduations for better readabilityExtra-thick extruded aluminum body holds up to heavy-duty use, ideal for use as saw guideLarge base helps provide better grip on materials