The Ultra O Screwgate Carabiner could be described as the perfect aid climbing carabiner - it performs remarkably well in a big wall environment and its I-Beam construction gives it an excellent strength to weight ratio.Oval biners are important because they allow pulleys to sit in a correctly loaded and equalised position. Their symmetrical shape stops them shifting under load and potentially dislodging a marginal gear placement. The locking gate adds a final element of security to the system.Oval shaped locking binerIdeal for pulley systems and aid climbingStrong and lightweight I-Beam constructionGenerous rope radiusStrength (gate closed): 25kNStrength (gate open): 7kNStrength (minor axis): 7kNGate opening: 22mmWeight: 65g