1 x Faithfull Carbide Hard Tile & Glass Drill Bit 8mm. The Faithfull Carbide Hard Tile & Glass Drill Bit is designed for drilling through glass and medium-wear tiles, making it a great choice for tasks like glass cutting, installing bathroom fixtures, mounting mirrors, and fastening screws in tiles. The drill bits come equipped with a high-quality carbide tip and reinforced head minimising stress and prevents cracking, leading to a longer lifespan. When used with a small amount of water, it can drill clean and precise holes up to 10 times in porcelain tiles with water cooling.