The Mammut Wall Alpine Belay is ideal for all alpine terrain, and is based on the tube principle. Securing a lead climber, the lightweight Wall Alpine Belay lets you have one or two second climbers independently belaying in an autolocking mode from a fixed point. The Wall Alpine Belay is optimized for comfortable belaying and reliable blocking in case of a fall by the second climber when the blocking action can be released again using a webbing sling and the large eyelet on the belay. V shaped grooves give you control for holding lead falls, even at low levels of manual force. The Wall Alpine Belay is ideal for twin, half, and single ropes anywhere from 7.5mm to 10.5mm in diameter.