HSS step drill bit. 3pcs hss step drill bit set wooden box
1. point thinning according to DIN1412 C;
2. cutting edge has thinning point;
3. right hand cutting;
4. spiral grooved;
5. 118 point angle;
6. tin-coated finish;
7. 90 point stepped angle;
8. absolute smooth operation;
9. high cutting achievement;
10. surface without discoloration
11. high performance steel.
The cone simplifies the retracting through bored sheet metals;
higherfeed especially in NE metals possible due to the slim cutting edge.