Dry Diamond Drill Bits Set 4pcs 6/8/10/12mm SANLEETEK Hole Saw and 1pc 6mm Carbide with Quick Change Hex Shank for Marble Granite Ceramic Porcelain Tile

【Specifications】Totally 5pcs: Diameter 4pcs 1/4"(6mm), 5/16"(8mm), 3/8"(10mm),1/2"(12mm) Drill Bits+1pc 1/4"(6mm) Carbide Drill; 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. The carbide bit provides more accurate drilling positioning and easier drilling 【Recommended Machine】Hand Drill, Bench Drill. Minimum RPM: 2000; Faster the RPM, longer the working life