New makita 18v xdt19 brushless cordless 1/4 impact 4 speed 18 volt quick shift it also features two tightening modes (t-mode) for faster tightening of self-drilling screws in thick or thin gauge metal that helps prevent damage to the screw or workpiece. It's part of Makita's expanding 18V LXT system, the world's largest cordless tool system powered by 18V Lithium-Ion batteries.