Features Multi Function: Can be used for both dry and wet drilling, don't worry about drilling with water, very convenient to meet your needs Drill Faster: Diamond hole drill bits have wax inside that absorbs and dissipates heat for faster, cooler drilling performance No Slip: With the fast change hex shank, can fits most hand drills, bench drills, easier and safer, no slip and fall off Simple Operation: Wet and dry drill bit adopts diamond material, can drill holes quickly and smoothly, efficient to use Wide Application: This diamond drill bit is widely suitable for porcelain, tile, ceramic, granite, marble, masonry, stone Specification: Item Type: Dry Diamond Drill Bit Material: Diamond Diameter: Approx. 5mm / 0.20in, 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.40in, 12mm / 0.47in, 14mm / 0.55in Sand Width: Approx. 10mm / 0.40in Total Length: Approx. 68mm / 2.68in, 68mm / 2.68in, 80mm / 3.15in, 80mm / 3.15in, 80mm / 3.15in, 80mm / 3.15in Package List:1 x 5mm Dry Diamond Drill Bit1 x 6mm Dry Diamond Drill Bit1 x 8mm Dry Diamond Drill Bit1 x 10mm Dry Diamond Drill Bit1 x 12mm Dry Diamond Drill Bit1 x 14mm Dry Diamond Drill Bit Note:Please add water when drilling hard granite, do not drill fragile glass, metal, wood Package List 1 x 5mm Dry Diamond Drill Bit 1 x 6mm Dry Diamond Drill Bit 1 x 8mm Dry Diamond Drill Bit 1 x 10mm Dry Diamond Drill Bit 1 x 12mm Dry Diamond Drill Bit 1 x 14mm Dry Diamond Drill Bit