DeWalt FlexTorq screwdriver bits are specifically designed for use with impact drivers, and can survive extended periods of heavy duty use without breaking - the standard 1/4" hex shank means they can also be used in standard drill drivers and electric screwdrivers as well as a wide variety of hand tools. The included impact rated bit holder means they can be quickly and conveniently swapped out as needed; additionally, this bit set comes with a DeWalt travel mug for keeping refreshments on hand while working. This set includes Phillips, Pozi and Torx bits, with duplicates of the most common sizes. Features and Benefits • Impact rated screwdriver bit set: suitable for impact drivers as well as many other tools • Contains Phillips, Pozi and Torx types • Impact rated bit holder for secure fitment in power tools and convenient bit changes • Duplicates of the most common sizes for backups in case of loss, wear or breakage • Durable carry case for storage and transport • Travel mug with lid for keeping out jobsite dust and debris Contents • 30 Piece Screwdriver Bit Set • Screwdriver Bit Holder • ToughCase Storage Case • Travel Mug