General description This premium professional diamond drill bits set includes multiple hole drills and a saw blade, designed for efficient and smooth cutting. It utilizes vacuum brazing technology for rapid, clean cuts and is suitable for materials such as porcelain, granite, and marble. Technical specifications Model: QHKZ7PCS Material: Diamond Drill Diameter: 4/5", 1", 1-3/8", 2-1/5", 2-3/5" Diamond Length: 0.6 in / 15 mm Bit Length: 2.36 in / 60 mm Product Weight: 4 lbs / 2 kg Connect: 5/8"-11 Universal Thread Usage: Dry/Wet Working Compatibility and accessories 5 x Hole Saw 1 x Saw Blade 1 x Storage Case Installation To install, keep the hole drill at a 45-degree angle, then continue drilling at a 90-degree angle with the horizontal surface. It is easy to install and operate conveniently. Usage The diamond hole saw drill bit set can be used both dry and wet. It is recommended to add some water to prolong the service life and ensure smoother operation. Other information