1,1/4"hexagon screw driver bits,screwdriver bits 2.material:S2 STEEL,CRV ... 3.surface:sand blast or black 1/4"hexagon screw driver bits,screwdriver bitsSpecifications 1. Material: S2, Cr-V , ... and lifetime more longerThe hex screw driver bits be listed here are the part we have now, if customers need ... send samples or drawings to show us the specs, we can follow to produce with best products and best ...