Hardened and heat treated Chrome Molybdenum steel Total Drive® impact sockets with a phosphate finish for corrosion resistance. All are suitable for Spline, Metric Hex and Metric Bi-Hex and many are equivalent to TRX-Star*, Whitworth, Imperial Hex and Imperial Bi-Hex. Suitable for use with air/electric impact guns. Supplied in storage case. Features & Benefits:Hardened and heat treated Chrome Molybdenum steel Total Drive® impact sockets with a phosphate finish for corrosion resistance.All are suitable for Spline, Metric Hex and Metric Bi-Hex and many are equivalent to TRX-Star*, Whitworth, Imperial Hex and Imperial Bi-Hex.Suitable for use with air/electric impact guns.Sizes: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24mm.Supplied in storage case.Lifetime guarantee*.Model No. AK5613TD Specifications: Model No AK5613TD Brand: Premier Quantity of Sockets: 13 Type: 1/2"Sq Drive - Standard Contents: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24mm Nett Weigh