The Dynaswivel is a patented universal-joint that connects portable air tools to an air line. (Patent No. D-295,552; D-295,553; D-317,818).Swivels 360 DEGREES AT TWO PIVOT POINTS allowing the air hose to drop directly to the floor while providing superb tool handling.Improves tool maneuverability, minimizes operator fatigue and extends hose life.This adapter is made of non-marring composite construction and is of industrial quality.Air flow: up to 33 SCFM.Dynabrade 94300 1/4" Composite Dynaswivel® 360 Degree Portable Airtool Adapter