carbide drill bit, tungsten internal cooling drill 

1. Imported tungsten steel base material, with higher wear resistance and strength, belongs to the high hardness and high-speed cutting applications of the dril.
2. High blade strength, sharp cutting, improve processing accuracy, reduce processing burrs, Smooth and bright handle end, precise chamfer design.
3. Cutting edge passivation technology，large chip space，Anti-collapse knife, wear, polishing and chip removal more smooth, stable.
4. Spiral chip groove design, easy chip removal is not easy to stick knife, fast processing, high accuracy of the workpiece, more gloss.
5. Imported ultra-micro nano coating, greatly increase the service life.ry