The Camp Yo-yo is similar to the Salewa Antz and Wild Country Single Rope Controller. A bight is inserted into the left side (as shown) of the controller, and an HMS carabiner is clipped through the slots and the bight. The HMS is anchored appropriately. Rope is fed by turning the Yo-yo horizontally. During a fall, the Yo-yo rotates into the orientation shown, and the rope is wedged between the HMS carabiner and the lower pin. In addition, the metal piece at the upper left has a V-slot that engages the rope, adding additional friction.
