Driak 3 Pics HSS6542 M2 steel Spiral Groove Unibit Step Drill Bit Set for Stainless Steel Wood
- 3 Pcs/set HSS6542 Spiral Groove Step Drill Bit for Stainless Steel Cutting.
- You can use water to cooling it when it is work and it can be used for even longer.
- You can use one drill for diferent aperture.
- No need of center punch.Compared with the ordinary twist drill,it is not easy to break and it can be used for deburring, chamfering and open hole.
- Recommend the drilling speed of 250--400 rpm.