DT DIATOOL Diamond Drill Bit 5PCS 10mm Hole Saw for Dry Drilling Tile Porcelain Marble Ceramic Granite

5 pieces 10mm dry diamond drill core bit Diameter: 10mm; Diamond Height: 10mm; Total Length: 62mm; Grit:#40/50; M14 Thread for Angle Grinder Dry drilling for tile porcelain ceramic granite marble stone Diamond drill bits with wax inside helps cooling the bits Vacuum brazed technology provide much longer life than electroplated ones