Rappel rings. Important for providing a smooth metal surface for the interaction between rope and rappel anchor. These rings are nice and have large radii for an easy retrieval. The steel rings here are the burliest we carry for use on maximally high traffic locations. The aluminum Cypher ring is nice and light and will hold up well except where the canyon is expected to be sandy - meaning, they will be cut fairly quickly by sandy ropes. We also use rapid links for this same purpose.