High quality: Made of high-strength carbon steel, nickel-plated on the surface, the drill tip is made of 80-100 grit diamond coating, high hardness, good abrasion resistance, sharp and long life Fast cutting: coated diamond hole saw head for clean cutting, high precision and smooth, no broken edges, easy to cut in clean and precise holes, center pilot holes and side holes help eliminate waste Keep cool and low speed] Work with all electric drills and hammer drills, please keep speed at 800-1000 per minute, keep adding more water to keep the drill cool, strictly prohibit dry drilling 15 sizes: diamond drill bit with laser marked size, easy to recognize: 6mm, 8mm, 10mm, 12mm, 14mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, 35 mm, 40 mm, 50 mm, all at 50 mm in length Applicable: ideal for making crafts and glass projects, wine bottles, glass blocks, sea glass, tiles, porcelain, ceramics, porcelain, granite and more. Not for use on concrete or depths greater than 1/2 (12.7mm)
Availablity: 3-5 days
Free shipping & return for orders over $200