General description This premium professional diamond drill bits set includes 4 hole drills and a saw blade, designed for efficient and smooth cutting. Utilizing vacuum brazing technology, it provides rapid, simple, and clean cuts, making it suitable for porcelain, granite, and marble. Technical specifications Model: QHKZ4PCS Material: Diamond Drill Diameter: 35 mm / 1-3/8", 40 mm / 1-1/2", 50 mm / 2", 68 mm / 2-3/5" Segment Height: 0.6 in / 15 mm Bit Length: 2.36 in / 60 mm Product Weight: 2.9 lbs / 1.3 kg Package Content 4 x Hole Saw 1 x Saw Blade 1 x Toolbox Usage The diamond hole saw drill bit set can be used both dry and wet, with a recommendation to add some water to prolong the service life. It is easy to operate: start at a 45-degree angle, then continue drilling at a 90-degree angle to the surface. Other information