Chrome Vanadium steel 6-point sockets, hardened and tempered for added strength. Fully polished chrome finish for corrosion resistance. WallDrive(r) 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(r) 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".