Diamond Hole Saw Set This premium professional diamond drill bits set, with multiple hole drills and a saw blade. Vacuum brazing technology provides a rapid, simple, and clean cut. It is suitable for porcelain, granite, marble. Efficient & Smooth Cutting Complete Tool Set Humanized Structure Simple Operation Features & Details Efficient & Smooth Cutting:The glass drill bit is made of premium grade diamond, delivers more effective performance than a traditional carbide or bi-metal hole saw. Vacuum brazing technology makes it highly thermostable and durable to use. Complete Tool Set: Our porcelain drill bit includes 5 sizes: 4/5", 1", 1-3/8", 2-1/5", 2-3/5" . It features a 5-inch saw blade. Having these types available will help you cover almost all of your applications. The drill set also comes with a storage case for your convenient carrying. Humanized Structure: This hole saw drill bit set adopts 5/8"-11 universal thread, suits for angle grinder. The design of U-shaped chip grooves