WORX WX255L SD Semi-Automatic Power Screw Driver with Screw Holder Screw holder attachment holds screw so you can work with one hand free  also catches screws as theyre removed Single-handed operation allows for extended reach; LED light provides increased visibility Reloadable cartridge stores 6 bits directly in the tool  always have the right bit at hand! Accepts any standard  hex shank insert bit  rapid slide-action easily and quickly advances the correct bit Powerful 4V MAX Lithium battery holds a charge for up to 18 months charger included