Cold-forged Chrome Vanadium steel 12-point sockets, hardened and tempered for added strength. Fully polished chrome finish for corrosion resistance. WallDrive configuration giving an additional 30% more torque handling power than traditional sockets. Knurled ring for extra grip with oily fingers. Sizes: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm. Supplied with socket rail. Lifetime guarantee*. Model No. AK2683