- Multifunctional Triangle Drill : Designed to penetrate a variety of materials including glass, tiles, marble, wood, limestone, stones, concrete, bricks, hard plastic, and cement. The industrial-strength hard alloy tip ensures exceptional wear resistance, making drilling tasks easier. - 10-Piece Set : Includes 10 stone drills in various sizes (3 mm to 12 mm) as well as 7 additional drill types to cater to all your drilling needs. It offers versatility from small to larger sizes for different applications. - Compatibility and User-Friendly Design : Compatible with most common drills, including electric drills, hand-held drills, and bench drills. The unique double U-shaped groove design allows for quick dust removal, enhancing visibility during use. - Professional and Precise Performance : Perfect for creating holes in bathroom tiles or wall mirrors. Effortlessly drills through tiles, concrete, bricks, glass, and wood while minimizing breakthrough damage. For optimal results, it is recommended to use water cooling and to adjust the speed accordingly. Use scenarios include: 1. Drilling mounting holes for bathroom fixtures in tiles without cracking. 2. Creating custom designs in glass for home decor without chipping edges. 3. Installing electrical outlets in brick or concrete walls securely and cleanly.