Polished chrome vanadium steel construction, lifetime warranty * SAE sizes - 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4 and 7/8 inch * Stubby SAE sizes - 3/8, 7/16, 1/2, 9/16, 5/8 and 11/16 inch * Metric sizes - 7, 8, 9, 10, 12, 13, 15, 17 & 18 millimeter * Stubby Metric sizes - 10, 11, 12, 14, 16 & 19 millimeter