Black Diamond ATC must stand on its own as one of the most popular climbing belay devices ever made. And with its unique geometry, light weight and extreme durability, the ATC needs very little help. When used correctly, this device provides silky smooth belays, holds falls with ease and doesn’t kink ropes. FEATURES: Designed to feed rope smoothly while belaying or abseiling. Locks up well with 9-11 mm ropes. Elegant, simple design is very lightweight. Return Policy: Climbing equipment sales are final. In order to guarantee the life saving integrity of the climbing gear we sell -- we cannot accept returns on any life safety climbing or mountaineering equipment.