Wide application for drilling tile ceramic marble stone.... Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times) Less Chipping, Minimizing breakage, less heat generation, Better quality High diamond exposure rate provides a faster and more aggressive drilling. Type: Brazing Hole Opener Triangular shank:50-70(Suit for electric hand drill) Total Length: 72mm Application: Excellent for making clean and accurate hole on marble, , glass and tile, etc. Note: Express transportation can cause wear marks, which does not affect the application Colour:Gold Material:Brazing Package Contents: 1 x 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.