Dry Diamond Drill Bit Set Tipped Hole Saw for Porcelain Tile Ceramic Marble Granite Stone,Diamond Core Kit Round Shank Fixed on Drills,No.K5(6/8/10/12/14mm)

【Package Includes】5 pieces dry diamond drill bits: each size 1pc,Diameter1/4 inch(6mm),5/16 inch(8mm),3/8 inch(10mm),1/2 inch(12mm),9/16 inch(14mm).Total Length 65mm,Diamond height 8mm,Diamond Grit #50/60,Round Shank 【Wax Inserted】Each dry diamond bit is embedded with wax that will melt during dry drilling to cool the cutting surface; Water can act as additional cooling to prolong the worklife of bit. 【Vacuum Brazing Technology】Processed by vacuum brazing technology, which garantees long service life and cost-value; High-quality diamond particles contribute to high efficiency and faster drilling speed. 【Multiple Application】Dry drilling for Granite, Tile, Ceramic, Marble, Stone, Glass, Porcelain, Masonry, etc. 【High Compatibility】They can be used with hand drills, bench drills and electric drill. Notice: If using Hammer Drill,please shut off Hammer Mode,Recommended 2000-5000RPM,MAX RPM 5000,the sooner the better