The 68005 is a can wrench. Two tools in one; saves space in your pouch. One end opens telephone box fasteners, the other end tightens nuts on binding-post terminals. 7/16” socket has a black finish and the 3/8”socket has a silver finish. Sockets are 1-1/4” (32 mm) deep to fit over long binding posts and are thin-walled for easy access into tight areas. Socket ends are color-coded for quick identification of socket sizes. Hex-socket design enables using a wrench to obtain extra torque.