Black Diamond's largest locking carabiner, the RockLock is a one-hand operable autolocking twistlock carabiner perfect for belaying, rappelling or anchors, and features a hot-forged lightweight construction and a large rope-bearing surface for greater durability. The Black Diamond RockLock carabiner features a keylock nose, the Munter hitch compatible and the autolocking twistlock sleeve can be operated with one hand. Now featuring a hot-forged lightweight construction and a large rope-bearing surface for greater durability, the RockLock is the go-to screwgate for every day climbing season after season