hgudesign Dry Diamond Drill Bits 5pcs Set Sizes 6mm 6mm 8mm 10mm 12mm with Quick Change Hex Shank for Porcelain Tile Ceramic

SIZE: 5pcs diamond drill bits (6mm 1/4", 6mm 1/4", 8mm 5/16", 10mm 3/8", 12mm) APPLICATION: Dry drilling suitable for Tile, Ceramic, Stone, Porcelain, Masonry. Water extends usage time. Built-in Wax: Our Diamond Tipped Drill Bits feature wax cores for automatic heat absorption and dissipation during use TECH: Vacuum Brazed technology for improved efficiency, faster operation, longer durability. Enhanced diamond drills more holes. NOTE: Cross hole opener aids in precise bit placement, not for drilling; Operate at 2000-5000RPM for longevity.