Diamond Drill Bits, 10Pcs Hole Saw Diamond Drill Bit Hollow Core Drill Bit Set for Diamond Coating, Carbon Steel for Glass, Ceramics, Porcelain, Ceramic Tile, Marble, Diamond Drill Bits for Glass Ceramic Tile Porcelain Hole Saw Cutting 10 Bit Set Note - When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn. Not for use on Concrete or for depths beyond about 1/2". ✔ Ideal Application - This diamond coated core drill bit removes a complete circle from glass, marble, tiles, granite, ceramic or other. They are perfect for drill glass, tile bottles, blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone ✔ Super Material - These diamond drill bits made of high-speed steel that is durable and have a long service life, which are high quality and good performance that excellent for making clean and accurate hole. ✔ Sharp & Smooth Cut - Coated with high quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably ✔ Note - When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn. Not for use on Concrete or for depths beyond about 1/2". Description: 1. Easy to use, high quality. good performance, long life. 2. Excellent for making clean and accurate hole on glass , tile and marble. 3. The perfect tool for professional or DIY use. 4. Can be used with a standard electric drill. 5. When cutting hard materials, it is important to ensure the cutter is kept cool. 6. to avoid damage to the material being drilled and premature wear of the cutter. 7. Always use lubrication (water ), otherwise the diamond core drill will burn. 8. Start your hole diagonally, make a round trace and then hold drill straight. 9. This diamond coated core drill bit removes a complete circle from glass, marble, tiles, granite, ceramic or other. Use note: Start your hole diagonally, make a round trace and then hold drill straight. Package includes: Diamond Holes Saw Drill BitsOn Jul 13, 2023 at 16:31:34 PDT, seller added the following information: