SHDIATOOL 5pcs/set Dry Diamond Drill Bits for Porcelain Tile Granite Marble M14 Thread

Available diameter: 20mm,32mm,45mm,55mm,68mm Specification: M14 connection, Total height 60MM, Diamond height 15MM Color: Golden Application:  Dry/wet drilling for porcelain tile, granite, marble, stone, Masonry, brick...                      Feature:  1.Less Chipping, Minimizing breakage, less heat generation, Better finish quality2.Vacuum Brazed technology provides longer working life, Fast and smooth drilling3.High diamond exposure rate provides a faster and more aggressive drilling4. Vacuum Brazed technology provide much longer working life than electroplated ones (Generally 3-5times),Save your money and time....5.Having less loss of material