Drill glass, marble, masonry, rocks, concrete- just about anything you want!
Super duty diamond coating on nickel plated high speed steel will give you excellent results even in semi-precious stones.
Fluteless design brings more diamonds in contact with your stock. Lasts longer and works better than twist designs.
Numbered sizes: 36 (0.1065"), 50 (0.0700"), 54 (0.0550"), 56 (0.0465"), and 60 (0.0400")
Note: use on a low speed with coolant (water/oil)