Neiko 20754A 3/8&rdquo; Drill Chuck with 1/4&rdquo; Quick Change Hex Shank | Convert Impact Driver and Wrench to Drill Drill chuck with 1/4 inch hex shank quickly connects to any impact driver and converts to drilling function With included 1/2 Drive by 1/4 Hex adapter, can easily transform power impact wrench to a drill Classic keyed 3-jaw design securely holds a wide range of twist drills and step drill bits with 1/16 to 3/8 shank Constructed from premium chrome vanadium steel for durability and stands up to extensive daily use This complete power tool conversion kit includes keyed 3/8 drill chuck, a chuck key and a 1/2 Dr. x 1/4 Hex adaptor