Tackle that honey-do-list with one tool. The Semi-Automatic Driver with rapid bit index is a sure-fired way to shoot through screw driving tasks around the house. What makes the WX254L Semi-Automatic driver unique is the bits are never lost. The WX254L includes two rapid reload cartridges that house 6 common screw driving bits each, making them easy to access and even easier to change. Simply go from drilling a starter hole-to driving a Phillips screw-to driving a flat head screw in a matter of seconds with the semi-automatic bit changer. It is as easy as choosing the bit, rotating the cartridge, and shutting the chamber-you are cocked and locked and ready to drive some screws. The WX254L WORX SD driver is lightweight and comfortable for one-handed operation making it easy to align a screw or hold material in place with the other hand. When the trigger is pressed, an LED light automatically lights the task for better visibility in dark or hard to reach areas. The compact size allows the SD driver to fit into tight spots where a clunky drill is too big for the task. This SD driver is perfect to keep close at hand in the kitchen junk drawer or handy tool bag. Quickly use it to tighten cabinet screws, door handles, light fixtures, outlet covers, and other around-the-house tasks and projects. Keeping the SD driver handy is also great for furniture assembly, hanging curtains, and installing window shades. It has a reversible rotation for any loosening or disassembly tasks. The 4-Volt lithium battery comes with a charger and will hold a charge up to 18 months. The two cartridges come with 6 preloaded bits for 12 total sizes of the most common screw driving bits to tackle any household job, including a screw starter bit. The WX254L Semi-Automatic Driver includes in Cartridge 1, T10, T20, H3, H4, H5, Screw Starter Drill Bit. Cartridge 2, P0, P1, P2, SL4, SQ1, SQ2.