Premium Aluminum Rafter SquareExtra thick aircraft grade aluminum for durability and maintaining accurate square. Brace measures octagon scale; board measures 2 way read sleeve. Individually inspected for accuracy. Deep graduations are filled with yellow paint for superior readability in all light conditions. Surface protected to resist corrosion. Beam Length: 16 in; Beam Width: 1 1/2 in; Blade Length: 24 in; Blade Width: 2 in; Finish: Black; Graduation(s): Back-1/16, 1/10, 1/12 in, Face-1/16, 1/8 in; Material: Aluminum; Measuring System: Inch; Quantity: 3 per box; Type: Framing Square; Weight: 0.85 lb.