Vacuum Brazed Dry Diamond Drilling Core Drill Bits Ceramic Tile Hole Saw Opener Granite Marble Porcelain Brick Drill Bit Tools,18mm

1.Dry drilling without water feeding,bits with Wax inside helps cooling the bits 2.Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times) 3.Less Chipping, Minimizing breakage, less heat generation, Better finish quality 4.High diamond exposure rate provides a faster and more aggressive drilling. 5.Application: Used for opening holes in marble, ceramic tiles, granite, pebbles, walls and other materials