This diamond countersink drill bits is designed for Bevelling，Enlarging, Grinding and Polishing the exsit holes or shaping edge of materials.
HIGH-GRADE DIAMOND: High quality dimoand grain make the edge of the hole smooth and clean, and can achieve excellent surface effect.
The chamfer effectively eliminate the rough holes of ceramics, tiles porcelain marble and other materials. ATTENTION: This i
Dry or Wet working,Multi-purpose for iron steel granite marble natural stone ceramic and even steel grinding
Vacuum Brazed Technology provide faster grinding Speed and longer working life and safer operation
