Our largest belay and rappel locker, the Black Diamond RockLock carabiner features a keylock nose, is Munter Hitch compatible and the autolocking twistlock sleeve can be operated with one hand. Now featuring a hot-forged lightweight construction, a redesigned spine for better handling, and a larger rope-bearing surface for greater durability, the RockLock is the go-to screwgate for every day climbing season after season.