This innovative yet simple construction is perfect to keep the Gri-Gri or other assisted locking devices in place while on belay duty. The Rhino also works perfectly with pulleys and other belay devices. Whether you are belaying a second on a multi-pitch route or descending from the top of the route, this compact and light weight locking carabiner can handle it all. The feature that makes this locking carabiner so special is the horn at the top of the strong I-beam spine of this carabiner. The horn helps prevent cross loading while on belay duty or any hauling situation. This makes the Rhino one of the most versatile lockers to use in an situation.