1. Vacuum brazed dry drill bits can be used in dry drilling of granites, marble, hard tiles, hard porcelain, etc.
2. It will perform much better if used in wet conditions; the life will be times more than the electroplated drill bits which can't be used in dry drilling. Drilling speed is fantastic fast.
3. Could be used wet or dry with cooling slots design for easier core removal when stuck.
4. Drill bits in 6mm, 8mm  are with top grade diamonds.
5. Diamond length:8-10mm
6. Self-cooling, self-sharpening(from 6mm-14mm)
7. Diamond grit: 40#

Our dry drill bits are widely accepted among many European countries, our dry drill bits are your best choice.