The SKIL 10-Piece Hex Shank Carbide Hammer Drill Bit Set includes 10 carbide-tipped 1/4-inch hex shank hammer drill bits for use on masonry like brick, block, and light concrete. The bits are packed in a SKIL modular bit case system for easy customized layouts, interlocking functions for stacking out your combination, and auto-connect snap latches for convenient one-handed use.