Diamond drill bits, set of 10 hollow bits for ceramic, glass, and porcelain tiles. Diamond drill bit set for ceramic tiles. Drill bits for glass, 6 mm - 30 mm - RWForet materials dli

10 sizes (diameter): 6 mm (1/4'), 8 mm (5/16'), 10 mm (3/8'), 12 mm (1/2'), 15 mm (3/5'), 16 mm (5/8''), 18 mm (11/16''), 20 mm (3/4''), 22 mm (7/8''), 30 mm (1-1/5''). Meets most of your needs.Stainless and durable: Made of high-strength carbon steel with a smooth nickel-plated surface to extend its lifespan.Fast, precise, and smooth cutting: Coated with high-quality diamond to improve drilling speed and create a clean, high-precision, and smooth cut without broken edges in seconds.Application: Drilling glass, tile bottles, block jars, fiberglass porcelain tiles, ceramics, marble slate, and light granite stone.Either your speed is too high, or the pressure you are applying is too strong.Your drill bit should never be hot to the touch, not even burning hot. Minimum speed: Always use lubrication (water). Minimum pressure: Package contents: 10 tile hole saws