Product Descriptions: Name: 6mm-12mm M14 Dry Vacuum Brazed Diamond Drill Core Bits Drilling Hole Saw Tools For Tile Marble Granite Stone Material: Diamond Color: BLACK Size: 6mm/8mm/10mm/12mm Total height: 60mm Diamond height: 10mm Features: 1. Dry drilling without water feeding, 6mm-12mm bits with Wax inside helps cooling the bits 2. Wide application for drilling tile ceramic granite marble stone.... 3. Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times) 4. Less Chipping, Minimizing breakage, less heat generation, Better finish quality 5. High diamond exposure rate provides a faster and more aggressive drilling. 6. Save your money and time... Application: Used for opening holes in marble, ceramic tiles, granite, pebbles, walls and other materials Package include: ●1 x Diamond Drill Core Bits Note: 1.Due to manual measurement, please allow 1-3mm error, thank you. 2.Due to shooting problems such as light, there will be chromatic aberration, please be careful.