Black Diamond'slargest belay and rappel locker, the Black Diamond RockLock carabiner is Munter Hitch compatible and features a keylock nose. 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 season after season.