Black & Decker™ Chuck Key is designed for hammer drills, EH drill, variable speed reversible drills, H.D, HD spade, HD reversible drills, holgun drills, spade handle drills, timber wolfs, HD variable speed reversible holguns, HD scrudrills, holgun 3 wires, holguns, magnetic drill press, heavy and extra duty reversing drill and DeWalt® magnetic drill press, VSR, electric drills, spade handle electric drills, variable speed reversing, joist stud electric drills, V/B drills.