With a drill bit and bit set, you get everything you need for different drilling and screwdriving jobs. You can drill in wood, metal, stone, or concrete and you can drive different types of screws. The set has Philips, Torx, and, Pozidriv bits and drill bits for various materials. The larger the set, the more different jobs you can perform. You can store the bits and drill bits in the useful case or box. That way, you can keep everything together and it's easy to take with you.