Dry Diamond Drill Bits Set 4pcs 6mm Hole Saw and 1pc Carbide with Round Shank for Marble Granite Ceramic Porcelain Tile Quartz SANLEETEK

【Specifications】Totally 5pcs: Diameter 4pcs 6mm Drill Bits+1pc 6mm Carbide Drill; Total length 65mm; Diamond height 8mm; Diamond Grit #35/40; Round shake 【Application】Dry or Wet drilling Marble Granite Ceramic Porcelain Tile Quartz, etc 【High Performance】Vacuum Brazed Technology and high quality diamond grains provide longer service life and superior performance 【Unique Detail】Special design of top spiral groove helps chips removal and improves efficiency. Cooling wax inside is conducive to heat dissipation. Carbide Drill provides you with more accurate drilling positioning and easier drilling 【Recommended Machine】Hand Drill, Bench Drill. Minimum RPM: 2000; Faster the RPM, longer the working life