General description The Sollbry 7Pcs 3-12mm Tile Glass Drill Bit Set is designed for multi-purpose use, featuring tungsten carbide tipped drill bits that are perfect for drilling through porcelain, ceramic, mirrors, concrete, brick walls, and glass. This set is ideal for DIY enthusiasts and home decoration projects, providing essential tools for working with hard and fragile surfaces. Technical specifications Material: Professional alloy steel Tungsten carbide tip for increased efficiency Bit sizes: 3mm to 12mm Shank size: 6.35mm Installation Keep the drill vertical while drilling Use water or coolant for lubrication to extend the life of the drill bit Usage Ideal for drilling ceramic tiles, glass, marble, and mirrors Not suitable for drilling hard tiles Other information Package includes 7 pieces of drill bits Easy to carry