- This diamond countersink drill bits is designed for Bevelling,Enlarging, Grinding and Polishing the exsit holes or shaping edge of materials.
- HIGH-GRADE DIAMOND: #80 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.
- Diamond core bits are worked great for dry drilling holes through hard porcelain tile, ceramics,bathroom tile,granite & marble, masonry, concrete, glass, hard plastic
- Carbide Drill bit mainly used to provide accurate positioning for diamond bit