MULTIPLE SIZES AVAILABLE: This core drill bit set includes three sizes: 40 mm, 45 mm, and 50 mm, giving you the right tool for different drilling tasks. PRECISE HOLE PLACEMENT FOR COUNTERTOPS: Designed specifically for countertop applications, it ensures accurate hole placement, making your installation seamless and efficient. EFFICIENT CUTTING PERFORMANCE: Capable of cutting through tough materials such as porcelain tile, marble, and slate with ease, delivering solid results in your projects. CLEVER CHIP REMOVAL DESIGN: Side chip removal holes speed up waste discharge, improving overall drilling efficiency. USE SCENARIOS: Kitchen or bathroom remodels: drill precise holes for sinks, faucets, or fixtures in stone or tile countertops. Stone and tile countertop fabrication: create clean openings for plumbing or electrical passthroughs in porcelain tile, marble, or slate. Renovation projects: retrofit or modify countertops by adding wellaligned holes for appliances or fixtures without chipping surrounding material.