1.Product Name:Hex bit sockets 2.Materail:CR-V 3.Surface:sandblast and Zn-coating ... full series of screwdriver bits, nutsetters, nut drivers, Hex bit sockets, socket adapters, bit holders and quick change connectors for screwdriver ... serive5.ISO9001:2008We have passed ISO9001:20086.Be usedHex bit sockets are widely used in producing home appliances and automotive