
【ALLOY STEEL MATERIAL】: Drill bit set forged from premium quality ALLOY STEEL, the glass drill bits allow for smooth and precise drilling in ceramic tiles, marble, mirrors, glass, aluminum, concrete, and wood. The durable drill bit must be well lubricated for the best possible results. This is most often done by running water over the drilling surface. 【DIMENSION】: Designed with a 6mm sharp point, the multi-material drill bits have a 1/4 inch design that reduces breakage. Length: 70mm, Shank: approx. 3/16 inch. Our spear head drill bits are very durable, meant to last a very long time. 【APPLICATION】Ideal for drilling ceramic tiles, glass, marble, and mirrors. When drilling hard materials, please use water for lubrication; proper cooling can extend the life of the drill bit. Glass drill bits are generally used with electric drills to create holes in all these materials. 【TUNGSTEN CARBIDE TIP】: The ceramic drill bit features a tungsten carbide tip for efficiency and longer life. During