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

Diamond Coating: A high-quality diamond coating increases drilling speed and makes the drill bit sharper. Chip-Resistant Groove Design: The cutting edge is sharper and more efficient. The side hole allows for chip evacuation while dissipating heat during material cutting. Rustproof and Durable: Nickel-plated surface for extended service life and increased corrosion resistance. Universal round handle, suitable for electric and hammer drills. Application: The center hole facilitates drilling. Suitable for drilling glass, marble, tile, limestone, fiberglass tiles, etc. Note: During drilling, the drill bit should be cooled with water to prolong its service life. Dry drilling is strictly prohibited.