Round shank or Hex shank drill bit for stone.
6mm,8mm,10mm,12mm,16mm, 22mm,28mm,32mm,38mm,48mm,52mm available.

Our diamond segments' advantage:

1. High percent of bond materials
2. High grade of diamonds
3. Over 15 years experence with hundreds of formula against different stones

4. Good sharpness, stable performance, long lifespan

5. Strict quality control
4. Keep 40-50 precent market share in China, Already acquired the customers' approval