MIBRO Industrial Glass and Tile drill bits help to make drilling into glass, tile, ceramic and mirror easier. Many users shy away from drilling into these materials for fear of cracking or breaking the fine material. Slow and steady wins the race. Drill slowly and ensure you apply water at regular intervals to keep the bit and material cool. This should help to reduce cracking and breaking. MIBRO Glass and Tile bits are made with premium, micro grain carbide. The carbide points are automatically centered and welded onto the drill body to ensure accurate placement for straight holes. Bits include 3-flat shanks for a secure grip in the drill chuck.