PHITUODA 15pcs 3/8-Inch / 10mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz

*Package Included: 12 x Diamond Drill Bits. Cutting Hole Diameter is 3/8" / 10mm, Shank Diameter is 1/4" / 6.44mm, Total Length is 2" / 50.9mm. *Quality Selection: These diamond drill bits are made of high-speed steel which is high quality and durable. With a nickel-plated coated body to resist corrosion, which has a long service life. *Smoothly Cutting: A thicken diamond dust coating on the tops offers superior cutting strength for creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure, and increased use of water lubrication will extend drill bit life considerably. *Multiple Applications: The diamond drill bit can remove a complete 10mm diameter hole on glass, tiles, granite, ceramic. In addition to cutting holes for glass, the Hole Saw comes in handy for tile bottles, blocks jars, fiberglass, porcelain tile, ceramic, slate, marble, light stone. Not for use on Concrete or for depths beyond about 1/2". *Hassle-Free Guarantee: PHITUODA's products can only be packed and shipped after strict quality inspection. If you are not satisfied within 90-days, send 1 simple email and receive a 100% money-back refund. We're so confident you will love our products like our other 5-star reviewers! You will be amazed at the customer service you receive after the sale!