Single-ended impact socket with hands free adjustment between socket sizes Two coaxial spring-loaded sockets in one tool Includes 3/4-Inch, 13/16-Inch, 1-Inch and 1-1/8-Inch square socket sizes plus a 7/16-Inch hex quick-change adapter Works on 1/2-Inch, 5/8-Inch and 3/4-Inch pole hardware 13/16-Inch diameter, 6-Inch (152 mm) long hollow shaft allows use on long threaded bolts Cross hole design to prevent unintentional separation of adapter and socket Replacement adapter is available (NRHDA4) Engineered for use with impact drivers