Our largest belay and rappel locker, the Black Diamond RockLock carabiner features a keylock nose, is Munter Hitch compatible and can be operated with one hand. Square hinge end holds belay loop securely in place Slightly curved spine maximizes gate opening Keylock nose prevents snagging One-hand operable Screwgate sleeve Type H or HMS connector. For dynamic belaying using a Munter Hitch or belay device. TECH SPECS Weight : 85 g (3 oz) Closed Gate Strength : 24 kN (5395 lbf) Open Gate Strength : 7 kN (1574 lbf) Minor Axis Strength : 7 kN (1574 lbf) Gate Opening : 21 mm (0.83 in)