Expert Quality, Draper Expert Multi - Drive® sockets manufactured from chrome vanadium steel hardened and tempered with a micro satin finish. Each socket has a knurled ring for extra grip. Draper Expert Multi - Drive® sockets allow them to be used with hexagon, bi - hexagon and Draper TX - STAR fixings. Packed on a plastic hanging rail that can also be used to store the sockets in a tool box.