Shimpo Wire Terminal Test Fixture (Upper and Lower) 100 lb Capacity, M6 Thread, Upper Wheel Grip has 9 Slots of Various Size, Lower is a Self-Tightening Serrated Cam Grip. Designed specifically to test the strength of wire / terminal connections. The upper grip consists of a self-aligning wheel with nine equally spaced slots of various terminal shank sizes; an eccentrically mounted, self-tightening bottom grip secures the wire on the other end. Sold as complete set.