Feature:1. APPLICABLE MATERIALS: Coring bits are designed for dry or wet drilled tiles, granite, marble, bricks and all similar materials2. FOR REAMING: Finger drill bits are used to enlarge, shape or fillet existing holes in porcelain, marble, granite and hard ceramics3. STABLE AND DURABLE: Vacuum brazing technology provides a longer service life, bring fast and smooth drilling4. STURDY MATERIAL: The tile installation kit is made of excellent No. 45 steel with vacuum brazed diamond technology, which is robust and extremely efficient5. PORTABLE AND CONVENIENT: The drill shank is M14, suitable for Angle grinders. Comes with a converter head and storage box for easy installation and carryingSpecification:Item Type: Diamond Hole Saw KitMaterial: No. 45 steelDrill Shank: M14Punch Diameter: Approx. 6mm / 0.24in8mm / 0.31in10mm / 0.39in16mm / 0.63in20mm / 0.79in25mm / 0.98in32mm / 1.26in50mm / 1.97inApplicable Machine: Angle grinder.Package List:9 x Drill Bit1 x Converter Head1 x Storage Box