If you’re building a deck or dock, fence or shed, an impact driver will give you more consistent results, and help get the job done faster because it drills, drives and fastens. This Mastercraft Maximum 18V, 3KO impact driver features a variable speed range of 0-2500 rpm. 1400 in-lbs of torque. LED work light. Electronic brake. Two battery packs (NiCad), charger and more.