... 3. Finish: sandblast Professional screwdriver bits1. Product name: tool parts of screw bit, screwdriver bit, drill bits;2. Length 25,50 mm3 ... .surface treatment: sandblasted;4. Material S2 or CRV steel for you to choose5.Phillips PH1,PH2 ... 6mm;Star T10,T15,T20,T25,T27, T30, T40;Ph1,PH2,PH3,Slotted 5/32", 3/16", 1/4",PZ1, ... , 1/4";T10, T15, T20, T25, T27, T30, T40; screwdriver bits