... :s2 3.Surface:sandblasted 4.Model Nomber:SBF-25mm bits screwdriver set,hex screwdriver bits,construction tools1.Material types:Cr-V 6150,8660 ... , Torx, square, hex, hex-plus, Z-spanner, Torx hollow, Torx plus, tri-wing4.length:25mm5.Special heat-treated6.property stabilize and lifetime longThe ... the specs, we can follow to produce with best products and best costs.