Feature: 1. CORE DRILLING BIT: Designed for dry and wet drilling of tiles, granite, marble, bricks, and all similar materials. 2. FINGER DRILL BIT: Used to enlarge, shape, or fillet existing holes in porcelain, marble, granite, and hard ceramics. 3. FINE WORKMANSHIP: Vacuum brazing technology provides longer service life, fast, and stable drilling. 4. EXCELLENT PERFORMANCE: The ceramic tile installation kit is made of premium steel material, using vacuum brazing diamond technology. Very efficient, faster drilling speed, durable and sturdy. 5. EASY CARRYING: With a storage box, these bits can be easily carried for convenient use, use whenever you want. Specification: Item Type: Diamond Hole Saw Bit Material: 45 Steel Drill Handle: M14 Hole Diameter: Approx. 25mm / 0.98in, 35mm / 1.38in, 45mm / 1.77in, 65mm / 2.56inm, 75mm / 2.95in Finger Drill Bit: 20mm flat head drill 50MM pointed head drill Applicable Machine: Angle grinder. Package List: 5 x Core Drill Bit 2 x Finger Drill Bit1 x Storage Box