Detail mata bor tap baut 6 pcs mata bor pembuat ulir drat mata bor drat tap drat baut rusak
1/4" hex shank HSS imperial screw thread tap taper & drill bits Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc. Fast replacement composite cone, uses drill edged principle Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency Self-centering point, do not need assistant center drilling or center punching. High hardness, rustproof, solid and durable