The Johnson Level 400 is a 12-Inch Zinc Head Combo Square. Features: * Heavy-duty steel blade with permanently etched graduations 1/8", 1/16", 1/32"Heavy duty cast zinc head with black chip-resistant e-coating finish * Reversible head with lock bolt and brass screw * Hardened screw-in scriber won"t fall out * Durable acrylic level vial What"s In the Box: * Johnson Level 400 12-Inch Zinc Head Combo Square