Adjustable arm length: 5-95cm Weight: 125g Certification: CE UIAA 109 Materials: Nylon, Aluminum, Thermoplastic Elastomer To shorten, pull the rope on the end. To lengthen, rotate the rope clamp (orange part). This is a popular item for self-belay at belay points. It shows signs of use, but functions without issue. A black rubber piece to prevent carabiner inversion is also included. Thank you for viewing.