Dry Diamond Drill Bits Set 5pcs 8mm SANLEETEK Hole Saw Kit with Quick Change Hex Shank for Marble Granite Ceramic Porcelain Tile Stoneware Quartz

【Specifications】Totally 5pcs: Diameter 5/16"(8mm); Total length 65mm; Diamond height 8mm; Diamond Grit #50/60; Handle diameter 6.35mm 【Application】Dry or Wet drilling Marble Granite Ceramic Porcelain Tile Stoneware Quartz 【High Performance】Vacuum Brazed Technology and efficient multi-purpose drilling provide longer service life and superior performance 【Unique Detail】Diamond Drill Bit integrated with wax lubricant inside which melts while dry drilling and cools the cutting surface 【Recommended Machine】Hand Drill, Bench Drill. Minimum RPM: 2000; Faster the RPM, longer the working life