Diamond-coated hole saw with pilot drill. 16-110 mm. Hole saw. Core drill. Core drill. Cutting tool for glass/ceramic/porcelain/marble/tile. Diamond-coated core drill. A high-quality diamond coating improves drilling speed and makes the drill bit sharper. The pilot drill facilitates drilling. Chip flute design. Split edges make it cleaner and the work more efficient. Side holes facilitate the removal of waste while dissipating heat during material cutting. Durable stackable design. Excellent tool for all DIY enthusiasts working in kitchens, bathrooms, showers, ceramics, porcelain, glass, and marble. Nickel-plated surface for longer life and increased resistance to surface corrosion. The universal round handle fits electric drills and impact drills. Specifications: Material: High-quality steel, diamond coating. Color: Silver. Diameters: 16 mm, 18 mm, 20 mm. 22 mm. 25 mm. 28 mm. 30 mm. 32 mm. 35 mm. 38 mm. 40 mm. 42 mm. 45 mm. 50 mm. 53 mm. 55 mm. 60 mm. 65 mm. 68 mm. 70 mm. 75 mm. 80 mm. 85 mm. 90 mm. 95 mm. 100 mm. 105 mm. 110 mm. Package includes: Purchased quantity applies. Note: Make sure to add water during drilling to avoid scalding. Reduce drilling speed and internal pressure and improve the use of water lubrication to significantly protect the drill bits.