Given that the belay is the critical link to safe climbing, the Petzl Reverso takes the process to the next level in simplicity and reliability. When belaying from above, and attached directly to an anchor's power point, this unique device is auto locking in the event of a catch. Offering independent belaying of two simul-climbing seconds, the auto locking feature requires amazingly minimal hand management. Good for single or double rope technique, the Reverso keeps rope separate for easier clipping off at alternate points, avoids crossing of line while rappelling, and does not twist the rope. Grooved spacers at the break over point provide excellent control for rappelling, lowering, or power belaying the leader. Designed for all styles of climbing, this multipurpose tool is a must have.