Klein Tools NRHD4 4-in-1 Square Impact Socket

4-in-1 Square Impact Socket The 4-in-1 Impact Socket Wrench features two spring-loaded sockets in one tool for hands-free pole hardware installation and removal. The 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. Each model is engineered for use with impact drivers effectively reducing the amount of time needed to finish the job.