Sunjoyco Diamond Drill Bits, 30 PCS Glass Hole Saw Drill Bit Set Cutting Remover ToolsIf you're a regular user of diamond drill bits it is worth having a combination of this diamond drill bits set!Features:1. High quality diamond: Diamond hole saw is made of high-speed natural diamond sand, which is solidified by specially enhanced electroplating. It is durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.2. Nickel-plated design: With a diamond dust coating offers a diamond hole saw a superior performance and cutting strength.3. Sizes: Includes the following diameters, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm. 16pcs hole saw drills + 14pcs 6mm Hole opener.4. Widely application: Perfect for drilling glass, tile bottles, blocks jars, fiberglass porcelain tile ceramic, slate Mable, Granite light stone (especially for glass & tile).5. Operation of the diamond hole saw: Start the hole diagonally, make a round braid and then hold drill straight. Water is required for lubrication when drilling.Specification:Type: Diamond Coated Hole Saw Drill BitsMaterial: Steel + Diamond SandProduction Process: ElectroplatingColor: SilverSizes: 6/8/10/12/14/16/18/20/22/25/28/30/35/40/45/50mmOperation Note:1. As with all diamond drill bits you should use water as a lubricant and coolant. 2. Being hollow, allows the water to flow up inside and around the inner core of these drill bits as you are drilling, helping to keep the drill bit cool and removing the debris. 3. Start your hole diagonally, make a round trace and then hold drill straight.Package Includes: -16pcs Hole Saw Drills -14pcs 6mm Hole opener set