The Milwaukee 4-Piece Glass and Tile Drill Bit features an exact start tip for clean holes and minimal bit walking in glass and ceramic tile. Engineered with sharpened carbide, Milwaukee Glass and Tile Bits provide faster tile drilling than standard glass and tile bits. These bits are designed with a reinforced carbide head for increased durability when high-speed drilling into tile and glass. They're specifically designed for drilling holes in glass and ceramic tile with drill-drivers only. These drill bits are not recommended for use on porcelain tile. This drill bit set includes one 1/8 in., one 3/16 in., one 1/4 in. and one 5/16 in. glass and tile bits. The Milwaukee 5-Piece SHOCKWAVE Carbide Multi-Material Drill Bits are the most versatile bits, designed to tackle a variety of materials, including brick, block, concrete, steel, aluminum, ceramic tile, backerboard, wood, PVC and drywall. The aggressive multi-grind carbide tip delivers up to 10X longer life in stacked materials and up to 85% faster drilling speeds in metal. Equipped with a 1/4 in. hex shank, these all-purpose drill bits are compatible with impacts, drill/drivers and hammer drills.