Rapid Reloadable Cartridge conveniently holds six bits in the tool. Cartridges come preloaded with 11 popular Phillips, slotted, Torx, hex, and square recess bits, as well as a screw starting drill bit for a pilot hole. Works with any standard 1/4" hex screwdriving bit. Auto Bit Shift advances the correct bit with a simple slide-action. Reverse operations with a side-mounted switch. Tackle any home project quickly without wasting time hunting for the right size screwdriver or bit. The Worx Semi-Automatic Driver keeps all your screwdriver bits conveniently located right inside the screwdriver, so you never have to fumble around in your toolbox in search of what you need. Once you select the appropriate bit, the Auto Bit Shift function automatically advances it right into place. . . . . . Rubber handle for comfortable grip. Front-mounted LED light for dark conditions. No load speed of 230 rpm. 4V MaxLithium battery holds a charge for up to 18 months. View instructions for use.