This belay/rappel device has multiple functions - great for the average climber and guide alike. Belay one or two ropes in "normal" fashion (off your harness) or switch to "auto locking" mode by attaching your REVERSO to your belay anchor (at the top of the pitch). In this mode, you can belay one or two followers and in the event of a fall the REVERSO will lock up yet allow you belay each rope independent of the other. Use with a locking biner on 7.5-9mm twin and half ropes or 8.9-11mm single ropes. Shown at right in "rappel mode". Clip REVERSO's small hole (at top of photos) to transport and rig the device to reduce chance of fumbling and dropping. Rope with REVERSO can then be clipped to belay loop after rigging properly - see instructions included. New forged constuction with V-shaped friction channels and asymetrically grooved side walls for durability and improved control. Delivered any where in the US.