High tempered aluminum with a buffed finish. Deep graduations. Includes lumber scale with board feet equivalent, decimal equivalent table, metric conversion table, formula for squaring a foundation, volume and area formulas, wood screw gauge table, nail sizes, depth scale, 1/8" graduations front and back, plus 45°, 60°, and 30° angle markings. Body 24" x 2". Tongue 16" x 1-1/2".