Chrome Vanadium steel 6-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. Supplied with socket rail. One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. Chrome Vanadium steel 6-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: 6-point; 5/32"", 3/16"", 7/32"", 1/4"", 9/32"", 5/16"", 11/32"", 3/8"", 7/16"", 1/2"", 9/16"". Lifetime guarantee*.