The answer to drilling ceramic, Porcelain, marble, glass etc
The solution to non-slip and easy start-up: Diamond ground tip geometry actually bites into tiles, eliminating wander and slip at the start of drilling. Each pack contains the same sized pro masonry bit to complete the drilling of supporting substrates to enable fixing installation.
This product is unbelievable we tried and test ourselves diamond crown will drill 1000 holes
For more information goto:
formatting link
Dealer inquiries welcome