15PCS Diamond Drill Bits Hole Saws for Glass, Ceramic, Porcelain, Tile and Granite 6-50mm

15 sizes: 15PCS Drill Bit Diameter a 6/8/10/12/14/16/18/20/22/25/26/28/30/40/50 mm. Diamond drill bit for glass, ceramic tile bottles, glass blocks, ceramics, marble stone slabs, perforated granite, and other hard surfaces (especially glass and ceramics). Materials: The diamond drill bit is made of high-quality natural diamond sand and hardened by a special electroplating technique. Note: Our drill bits are not suitable for use with microcrystalline materials of any surface or tile. Advantages: The nickel-plated diamond dust coating offers excellent performance and cutting resistance, no damaged edges, no vibration, low cutting resistance, fast opening speed, easy chip removal, etc. Operation: The drill bit can be used to cut diagonal holes, create circular joints, and drill straight holes. Water should be used during drilling.