An absolute must for lovers of big walling - Cassin's Rurp, the 'Realised Ultimate Reality Piton''. Perfect for thin cracks and opening up seemingly unclimbable passages! The Rurp should only be used as an aid tool and not incorporated into a safety chain. Since the back sticks out, the Rurp is easy to secure and remove. Definitely a piece of equipment that is a symbol for the history of climbing!