The Milwaukee 4-Piece Tile and Natural Stone Drill Bit Set delivers up to 2X life in granite, stone, ceramic tile and glass. These bits are designed for use in hammer mode, providing faster drilling speeds when drilling into natural stone tiles, like granite and marble. Equipped with an aggressive 8-grind carbide head, these bits deliver up to 20% faster drilling. The bit's reinforced tip protects the carbide head, providing the durability needed for use in hammer drill mode. Milwaukee Tile and Natural Stone Bits can be used in drill-only mode or hammer drill-mode and are not recommended for porcelain tile. This kit includes one 1/8 in., one 3/16 in., one 1/4 in. and one 5/16 in. drill bit for natural stone. The Milwaukee 5-Piece SHOCKWAVE Carbide Hammer Drill Bit Kit uses sharpened carbide to deliver up to 5x longer life in concrete and up to 2x faster drilling into masonry materials. Engineered with a precision ground tip, these bits deliver faster starts and less walking in concrete, brick and block. The carbide-tipped masonry drill bits' wide flute design removes dust faster, reducing heat and delivering more holes per charge.