Work with any fastener type using the Fuller tool bit set, with 34 bits in a handy case that attach to manual or power screwdrivers. It works with more than just Phillips and flat-head screws. Made from tempered steel, this drill bit set includes bit types such as security, hex, torx, torq, square, and tri-wing in a range of sizes, as well as the variations used in increased security applications. Quickly find the one you need from the storage case with the markings etched on each bit. A magnetic holder keeps them securely in place while you work. These drill bits work with manual and power drills and screwdrivers.