15pcs Diamond Hole Saw Drill Bit Set Glass Ceramic Tile Saw Cutting Tool 3-42mm Made of high strength carbon steel with smooth nickel plating surface, glass drill bit set lower resisting force to the minimum, makes it easy to drill precise holes In Seconds.Diamond Drill Bits Start the hole diagonally, make a round braid and then hold drill straight. Water is required for lubrication when drilling.Suitable for Drilling holes for Glass, Tile Bottles, Blocks Jars, Fiber Glass Porcelain Tile Ceramic, Slate Mable, Granite Light Stone (especially for glass AND tile).Each diamond hole saw was processed by a smooth and exact finish that lower the incision resistance and drill pressure, increase the sharpness and the use of water lubrication.​ Features:1.100% brand new and high quality. 2.Environmental protecting and easy to use. 3.Please start drill at 45 Degree to surface and align to 90 Degree as hole forms 4.It is perfect for glass ceramic marble tile granite 5.Simple to operate and convenient to use. 6.The diamond coated core drill bit removes a complete circle from glass, tiles, marble, granite, ceramic or other materials. 7.Works better with a electric drill. (not included) Size: (outside diameter) 3/4/5/6/8/10/12/14/16/18/20/22/25/26/42mm Package Includes:1 x 15pcs Diamond Coated Hole Saw Drill Bits Powered by SoldEazy