BLENDX Diamond Drill Bits : Diamond Drill Bits, are also as Diamond Core Drill Bits, Diamond Hole Saws or Bonded Diamond Drill Bits. They are often Glass Drill or Tile Drill, but they are so much more various since they are used to drill glass, ceramics, porcelain, instrumentality tile, porcelain tile, limestone, slate, marble, granite, digestible stone, and fiberglass. : · Material : steel · angelical Performance and long-range life. · for making perfect and hi-fi hole on glass and tile. · better with a galvanic drill -LRB- Excluding in the item -RRB-. · -LRB- outdoor diameter -RRB- : 6 mm, 8 mm, 10 mm, 14 mm, 16 mm, 18 mm, 22 mm, 35 mm. 40, 50 mm. · totality : about 5.2 cm · relevant Industry : suited for Stone, Tiles, Ceramics, Glass and Granite, etc Processing. Use : 1. Start your hole diagonally, make a rhythm trace and then drill straight . . . Always lubrication -LRB- water -RRB-, otherwise the diamond core drill will burn. Package : 10pcs * Diamond Coated Drill Bit .