Item:BGTEC Vacuum Brazed Diamond Water Sink Dill Bits Ceramic Marble Granite Tile Countertop Grinder Drilling Crowns Quantity: 1pc Color: Orange Package: Plastic Box Connection: Triangle Shank, Shank diameter 10mm Specification: Diameter 45x60mm; Work length 45mm; Total length 75mm; Diamond height 6mm,Grit #35/40; Features: 1) Special design for drilling and grinding holes in water sink or countertop that made of ceramic,tile,marble,granite,etc. 2) Two holes on the bit body help heat dissipation and scrap removal. 3) Grit#35/40 diamond particles coated, improve finish quality. 4) Vacuum brazing technology prolongs working life. 5) Dry or wet use. Customize Service If you order more than 20 units of same specification,we could mark your LOGO on our products.Please contact us first.