Description: The rockO is a blend of the traditional oval and the rockD giving it more strength than the standard oval. This design is great for users that need extra room at the bottom of the carabiner while keeping their gear aligned. The ORCA is an enhanced 3-stage mechanism available on Pirate, rockD and rockO carabiners. This unique gate system lifts up and twists just like many traditional auto-locks, but can be set to remain in the unlocked position. This allows the gate--whether you attach the ORCA carabiner immediately, or leave it installed in an anchor to connect a line later, to open easily, just like a non-locker. And when it closes, it closes and rotates shut with the safety and surety of a locking carabiner.