A device for gripping a cable is presented that has a retention member rotatably disposed within a cable guide such that upon entrance of the cable within an entrance port, the cable moves between the retention member and a wall, causing the retention member to simultaneously rotate and move toward the exit port and away from the wall until it abuts the exit wall and rotates in place as the cable is pushed out the exit port. When the cable is pulled toward the entrance port, the retention member simultaneously rotates and moves toward the entrance port and the wall, wedging the cable between the wall and the retention member.