BGTEC Diamond Core Drill Bits, 5pcs 6/6/6/8/10mm Triangle Shank Hole Saw Bits for Ceramic Porcelain Tile Marble Granite Stoneware Quartz Vacuum Brazed Bit 65mm Length

【Size】5pcs diamond core drill bits, diameter 6/6/6/8/10mm; total length 65mm; diamond height 10mm; diamond grit #50/60; triangular shank diameter 10mm; 【Application】Suitable for drilling granite and marble, tiles/ceramics and a variety of other materials; can be used for dry and wet drilling, with longer service life when used with water. 【Cooling and Heat Dissipation】6-10MM internal wax cooling wax, when drilling, the cooling wax melts to lubricate and cool the drilling surface. 【Not Easy to Chip】Precision diamond particles and vacuum brazing technology ensure that the drill bit is not easy to chip or damage during the drilling process, guaranteeing work safety and efficiency. 【Applicable machines】Hand drill, bench drill. Recommended speed: 2000 to 5000 rpm; the higher the speed, the longer the life of the drill bit. If you are using an angle grinder, please install a drill adapter.