18Pcs Diamond Drill Bits for Ceramic, Diamond Hole Saw Drill Bit Set Kit 0.2in~2in

Diamond drill bits are made of industrial grade carbon steel and have a nickel-plated coating to resist corrosion.   The thickened diamond coating on the top provides excellent cutting strength for high-precision, smooth cuts without hemming for maxi

5mm/0.2inch, 6mm/ 0.23inch, 8mm/0.31inch, 10mm/ 0.39inch, 12mm/0.47inch, 14mm/0.55inch, 16mm/ 0.62inch, 18mm/0.7inch, 20mm/0.78inch, 22mm/0.86inch, 25mm/0.98inch, 26mm/1.02inch, 28mm/1.1inch, 30mm/1.18inch, 35mm/ 1.38inch，40mm/ 1.57inch, 45mm/1.77inc

Diamond hole saw drill bit set kit removes a complete circle from glass, marble, tiles,granite, ceramic or other. , Perfect for drilling glass, porcelain tile, granite, bottles, Wood, Blocks Jars, ceramic marble and  other hard surfaces etc.

When the diamond bit is working, please continue to add water to reduce the drilling speed, reduce the drilling pressure, and increase the water lubricity, which will greatly extend the life of the bit.