Starrett® Master Precision Square, Non-Graduated, Series: 55 Series, 3 in Size, Measuring System: SAE, 3-1/64 x 55/64 in Tongue, 3-3/4 in Width, 1/16 in Thickness, Hardened Steel, Plain Starrett® 55-3 Non-Graduated Master Precision Square with Beveled Edge, 3 in, 3-1/64 x 55/64 in Tongue, Hardened Steel