KC-26-9 Apex 5/16” Universal Socket Extension Wrench allow you to operate in hard to reach places. Apex impact universal socket extension wrenches are manufactured to last in the most demanding environments. Apex impact universal socket extension wrenches are recognized as the industry leader in impact universal extension wrench tooling throughout the aviation industry as well as automotive, heavy industry or anywhere quality tooling products are required. Though Apex impact universal socket extension wrenches are made for the toughest of jobs they are not designed to be used with impact drivers.