4 pc DIAMOND DRILL BIT SET for GLASS ROCK STONE TILE SMALL SIZE 1/8″ – 1/4

Drill glass, marble, masonry, rocks, concrete etc… 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. Sizes: 1/8″, 5/32″, 3/16″, and 1/4″ Note: use on a low speed with coolant (water/oil)