Keep Your Safety: It uses the friction between the rope and the Descender device to slow down the descent or brake. Extra thick with ears and belay slot will keep your safety, even in a rescue or emergency situation. Superior Braking Resistance: Breaking strength 11,000 lbf (50KN/5000kg). Allows for smooth rope action while descending or belaying, offers superb control on rope. Figure 8 Descender: Big Wall Climbings Terminal 8 with Ears is an improvement over standard figure 8 devices with improved breaking and safety features.