For use in conjunction with the Petzl ASCENSION handled ascender for rope climbing. Can also be used with the BASIC ascender. Features: Angled attachment hole helps keep device properly aligned. Rectangular upper hole for the attachment of shoulder straps to improve positioning. Chrome-plated steel cam with inclined teeth to provide grip on wet, icy or muddy ropes. Self-cleaning slot on cam. Can be installed onto the rope one-handed (with ergonomic thumb catch). 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.