8PCS 1/2"" DRIVE 12-POINT SOCKET SET M5-M18 High-strength chrome-molybdenum steel structure, black phosphating treatment, corrosion resistance, rust resistance. 1/2"" Drive Impact 12-point socket set include 5, 6, 8, 10, 12, 14, 16 and 18 mm. The one-piece construction is more durable and can handle higher torques. Precision machined drill tips ensure precise dimensions and a precise fit. Length: 78mm / 3 inch Material: CR-MO Sizes: M5, M6, M8, M10, M12, M14, M16, M18