5pc Plastic Box Drilling Ceramic Tile Drill Bit Glass Concrete Cement Electric Hammer Drill Multifunctional Drill BitFeature: 1. Special Design : Spear pointed design strong Carbide cutter head can easily penetrate various material. U groove drill bit design, The spiral shank increase cutting speed and prevents slipping, It also removes flakes and debris easily, leaving you a clean and smooth hole. The drill bits are durable and will stay sharper.2. The surface is coated with electrophoretic paint to prevent the drill bit from rusting, and the traditional plating process is abandoned, and the product quality is higher. The surface of the drill bit is polished and the surface is smooth. Special bevel connection is designed for reducing resistance. Hex shank is designed for preventing slipping. 3. Multipurpose : Masonry drill bits set is widely used, it can easily penetrate various material, like ceramic tile, glass, hard plastic, cement concrete, mirror travertine, brick wall, wood, and can reduce breakout. 4. Drill Bit Size: 5 Pcs drill bit set with 4 different sizes,2x 6mm,1x 8mm,1x10mm,1x 12mm. Various sizes for different use to help you finish various of your daily needs. Specification: Color: black, silver, gold Style: 6mm, 8mm, 10mm, 12mm Material: CarbideCooling type (internal cooling/external cooling): external coolingUses: glass ceramics, vitrified tiles, all-ceramic tiles, brick walls, wood, plasticsCompatible equipment: lithium electric drill, hand drill, bench drill Package Content: 2x6mm bit 1x8mm bit 1x10mm bit 1x12mm bit