Step Blind Hole Drill Bit step drill bits dowel drill bit

1. For drilling blind holes without chips.
2. Negative angle drag precut for slanted cuts.
3. Twist drill with centering tip and execution phase.
4.Use fine grain tungsten steel round rod and low temperature welding technology to ensure welding quality.
5. The advanced five-axis CNC machining center ensures the precision of the final product through one-step forming technology.
6. Employ special surface treatment technology to reduce friction.
7:sharp and wear-resisitant,fast chip removal,high processioing effciency