Item: BGTEC Vacuum Brazed Diamond Drill Core Bits For Ceramic Tile Marble Masonry Hole Saw Drilling Crowns Connection: Triangle Shank(shank diameter 10mm) Quantity: 2pcs Package: Plastic Box Specification: Diameter 50(Grit #40/45),Total length 65mm,Diamond height 10mm; Application: Suitable for drilling porcelain, ceramic, tile, granite, marble, stone, masonry, brick... Feature: 1.Spiral grooves at top of the bit help scraps discharge,higher drilling effciency. 2.High quality diamond coated,make finish smoother. 3.Vacuum Brazed technology prolongs working life. 4.Dry or wet use. ---------------------The End---------------------