*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 9 sizes:1/5", 1/4", 5/16", 3/8", 1/2", 3/4", 1-1/4", 1-3/8", 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 provides longer working life, fast and smooth drilling. *Simple Operation: The diamond hole saw drill bit set can be used both dry and wet, to meet your various needs, recommended adding some water to prolong the service life. *Wide Application: The diamond drill bit set ensures a clean and accurate hole on porcelain tile, granite, marble, and stone. It also applies to masonry, brick, and all similar materials. ******************************************************************************************************* *Specifications Model: QHKZ6PCS Material: Diamond Drill Diameter: 1/5" - 2-3/5" Segment Height: 0.6 in / 15 mm Bit Length: 2.36 in / 60 mm Product Weight: 3.5 lbs / 1.5 kg ******************************************************************************************************* *Pakcage Content 9 x Hole Saw 1 x Saw Blade 1 x Toolbox