The Freino is ideal for adding or adjusting friction during the descent. Additional Information: - Carabiner with brake hook for descenders - Opening of the snap for the brake hook: 12 mm Type: Locking Carabiner Dimensions Weight: 85 g Size / Opening: 15 mm Carabiner With Keylock catch With anti-twist mechanism: No Material: Aluminium Closure type: twist-lock Maximum Load Cross pass: 10 kN Open: 9 kN Long tension: 25 kN Certification Testing & approval, standards: UIAA 121