Tungsten carbide multi-purpose drill bit set for porcelain, ceramics, mirrors, concrete, 7 pieces from 3 to 12 mm

High Quality: The drill bits are made of professional tungsten steel. Highly hard, they are strong and durable. They are wear-resistant and offer a longer lifespan than ordinary steel drill bits. Their hexagonal shank ensures a stable grip and quick removal from the electric drill.

Uses: Suitable for drilling tile, glass, marble, and mirrors. For drilling hard materials, use water lubrication; proper cooling can extend the drill bit's lifespan. When drilling, be sure to hold the drill bit vertically and use water or coolant for lubrication. Do not use these drill bits for drilling hard tile.

Wide Application: For DIY enthusiasts and home decorators, this is an indispensable tool for drilling holes in glass and other hard and brittle surfaces.