The DeWalt DW5470 5-piece Rock Carbide SDS Plus Hammer Bit Set is suitable for drilling in concrete, masonry, artificial stone, and rock. Each bit comes with a rock carbide tip for longer bit life and a 4-flute design that cleans debris out for fast, efficient drilling. These bits fit into standard 3/8-inch and 1/2-inch chucks. This set includes 3/16-x-6-1/2-inch, 1/4-x-4-inch, 1/4-x-6-inch, 3/8-x-6-inch, and 1/2-x-6-inch bits.