Petzl Locker Screw-Lock Carabiner (Fall 2010) Compact and light asymmetrical locking carabiner. 6082-series aluminum Large capacity and wide opening gate due to asymmetric design. Special compact profile for reduced b Keylock system. SCREW-LOCK manual locking system Gate opening 21mm. Major axis strength 24kN. Minor axis 9kN. Open gate 8kN. CE / UIAA certified Weight: 63 g (2.2 oz) .