Black & Decker™ Holder is designed for 1/2" hammer drills and DeWalt® V drill, B drill, 1 1/2", 3/8" 4.2 A and 1/2" VSR hammer drill, masonry saw, 4.2 A variable speed hammer drill, variable speed reversing drill, 1/4", 3/8", 1/2", 3/8" and 1/2" electric drill, 1/2" and 3/8" VSR electric drill, 1/2" VSR hammer drill, variable speed orbital jig saw, 2500 RPM electric drill, 120 V 4.5 A VSR electric drill, 120 V joist stud electric handle, spade handle as well as end handle electric drill.