1. Dry drilling without water feeding, 5mm-12mm bits with Wax inside helps cooling the bits 2. Wide application for drilling tile ceramic marble stone... 3. Vacuum Brazed technology provide much longer working life than electroplated (Generally 3-5times) 4. Less Chipping, Minimizing breakage, less heat generation, Better quality 5. High diamond exposure rate provides a faster and more aggressive drilling. Size:65mm Save your money and time. Application: Used for opening holes in marble, ceramic tiles, , , walls and other materials Colour:Green Material:Grade II emery+No.45 steel Package Contents: 1 * 65mm M14 threaded cyclone brazing hole opener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.