1,1/4"hexagon screw driver bits,screwdriver bits 2.material:S2 STEEL,CRV STEEL ... surface:sand blast or black 1/4"hexagon screw driver bits,screwdriver bitsSpecifications 1. Material: S2, Cr-V ,6150 ... red, Cr-coating, nickle plating, or any other special finishes be required by customers 4.Type:double head, ... guarante and lifetime more longerThe hex screw driver bits be listed here are the part we have ...