Petzl OK Review

This carabiner is great to use with a pulley. It makes sure the force always lines up straight down and keeps the pulley from shifting from side to side. In our tests we also found the rope runs very smoothly through it. The OK would make a great top rope anchor carabiner whether used by itself or doubled up. We love that the carabiner comes with a key-lock design. Because of its symmetrical shape, you never have to worry about the carabiner flipping around to the unwanted end when belaying. It is available with manual locking system (screw-lock) or auto-locking system (twist-lock).