The Nordwand alpine belay device is an innovative and very durable belay device from Mammut, suitable for single, half and double rope climbing. The brake grooves and the surface of the rear sliding surface leading the rope are made of abrasion-resistant steel, which protects these parts from wear caused by the friction of the rope, and the body is made of very light aluminum. It is equipped with a self-locking function when picking up a station.