BD&';s lightest full-function pear locker, the Black Diamond VaporLock carabiner provides a smooth increase in friction and is ideal for belaying and rappelling when you want more control. Increases friction up to 30% when lowering or rappelling with an ATC Munter Hitch compatible on ropes up to 9.4 mm Keylock nose prevents snagging Screwgate sleeve Type H or HMS connector. For dynamic belaying using a Munter Hitch or belay device. Tech Specs Weight : 52 g (1.8 oz) Closed Gate Strength : 21 kN (4,721 lbf) Open Gate Strength : 7 kN (1,574 lbf) Minor Axis Strength : 8 kN (1,798 lbf) Gate Opening : 20 mm (0.79 in)