Professional Quality Dry Vacuum Brazed Diamond Tile Drill core bits Feature: 1. Dry drilling without water feeding, 6mm-16mm bits with Wax inside helps cooling the bits 2. Wide application for drilling tile ceramic granite marble stone.... 3. Design of lightning tooth cutter head is Beautiful and conducive to debris discharge. 4. High grade diamond and vacuum brazing process provide longer service life 5. Less Chipping, Minimizing breakage, less heat generation, Better finish quality 6. Less debris, minimize breakage, and better finish Specificatiom : Total length 60mm, M14 Thread; Diameter 6mm, 8mm, 10mm, 12mm, 14mm,16mm, 20mm, 28mm, 25mm, 32mm, 35mm, 38mm,40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 68mm, 75mm, 90mm, 100mm; Grits: #35/40 Quantity : 1pc only ------------------------------END------------------------------------