Features: * Wide application for drilling tile ceramic granite marble stone.... *Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times) * Less Chipping, Minimizing breakage, less heat generation, Better finish quality * High diamond exposure rate provides a faster and more aggressive drilling. Specifications: Type: Brazing Hole Opener Triangular shank:40-60, 45-65,50-70(Suit for electric hand drill) M10 Thread: 40-60,45-65,50-70(Suit for 100 Type angle grinder) Total Length: 64/72mm Quantity:1pc Application: Excellent for making clean and accurate hole on marble, granite, glass and tile, etc. Package Included: 1pc Brazing Hole Opener Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Wide application for drilling tile ceramic granite marble stone.... Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times) Less Chipping, Minimizing breakage, less heat generation, Better finish quality High diamond exposure rate provides a faster and more aggressive drilling.