Diamond Drill Bit with Centering Bit, 25mm Hole Saw Core Drill Bit Cutting Tools for Glass/Ceramics/Tiles/Clear Stone

Diamond Coating: The high-quality diamond coating increases drilling speed and makes the drill bit sharper. Chip Flute Design: The edge is cut for a cleaner cut and more efficient operation. Side holes facilitate debris removal while dissipating heat during material cutting. Rustproof and Durable: The nickel-plated surface provides a longer lifespan and greater resistance to surface corrosion. Universal round shank for electric drills and impact drills. Application: The center bore facilitates drilling. Suitable for drilling glass, marble, ceramic tiles, limestone, fiberglass tiles, etc. Note: During the drilling process, water should be used to keep the drill bit cool in order to prolong the tool's lifespan. Dry drilling is strictly prohibited.