This drywall T-square is made of anodized extruded aluminum that won't turn your hands black from oxidation. The long-wearing black markings make it easy to read, plus the reverse ruled body is easy to read from either direction. The 2-inch wide blade of the T-square features 1/8-inch graduations for precision. The 16-inch arm and markings on the blade make it easy to locate studs. The notched head has a lip that rests on the edge of wallboard and drywall to easily mark for cuts. Four rivets connect the tongue and body for rugged durability and strength. Sands Level & Tool Co.® has been manufacturing quality levels in the United States since 1895. As they have for over 120 years, "Sands Levels Tell the Truth." Sands Level & Tool Co.® is a wholly owned subsidiary of Kraft Tool Co.®.