【12-PIECE SET】This diamond tile hole saw kit includes 12 essential pieces: 7 diamond core drill bits (1/4", 5/16", 3/8", 1", 1-3/8", 2", 3", 5"), 1 finger bit (4/5"), 1 beveling chamfer bit (2"), 1 SDS shank adapter, and 1 Diamond Saw Blade Cutting Disc Wheel with X Mesh (4.5"). Perfect for a wide range of drilling, milling, and chamfering tasks. 【APPLICATION】Dry drilling/milling/chamfering for porcelain tile, ceramic, granite, marble, stone, masonry, brick... Wet drilling/milling can prolong the service life. For extended tool life, wet drilling is recommended. Ideal for both DIY enthusiasts and professional contractors. 【FEATURES】The use of vacuum brazing technology to provide a longer working life, the use of high-quality base steel and diamond, combined with the scientific ratio to create a steady increase in efficiency.Mesh turbo rim with hybrid diamond segment provides fast high-quality clean cutting and minimal chipping. Reinforced steel core prevents flexing, wobbling, and vibration during cutting. 【ATTENTION】Widely used in Angle Grinder, do not use the impact mode when switching to a machine with an impact mode. Recommended RPM: 6000, maximum RPM: 11000. The 125mm core drill bit's recommended RPM: 3000-6000RPM. The Tile Blade's recommeended RPM is 8000,maximum RPM is 13200. 【USER TIPS】Use the suction cup locator to accurately position the drill or hold the drill at a 45-degree angle and drill in a circular motion until the drill begins to penetrate the material, then work the drill vertically. Premium Diamond Tile Hole Saw Kit – Precision Cutting for Porcelain Ceramic Marble Brick Granite – Durable, Versatile, and Easy to Use for Flawless DIY & Professional Results