The STANLEY ST45600 Steel Carpenter’s Square is a durable L-shaped layout and measuring tool for carpenters, woodworkers, builders, and construction professionals. It features a 24" × 16" body, a 16" × 1-1/2" tongue, and clearly readable 1/8" graduations. The square uses tempered steel construction and a protective finish designed to resist corrosion. Its reverse-reading scale and graduations on the face and back help make measuring and marking more convenient.