The MILWAUKEE SHOCKWAVE Square Hex ?" to ¼" Impact Socket Adapter transform impact socket wrenches into impact drivers with square hex bits for every application. The Impact Duty Milwaukee socket adapters are made from a proprietary steel, heat treated to control hardness and provide durability with up to 30X life. The socket adapter has a heavy-duty construction for fastening capabilities in all impacts. Milwaukee hex to square socket adapters are engineered for maximum durability and long-lasting use. This ?" to ¼" impact socket adapter is designed for use on ?" drive impact wrenches and holds ¼" hex shank accessories.