The Notch Rook Pulley from Rock Exotica provides the functionality of a pulley with a rigplate. The swivel top offers three connection points lined with rubber o-rings to grip carabiners tightly. These connection points were specifically designed for the rock-O carabiner to avoid dangerous cross-loading.
The most simple use of the pulley is on the rope bridge of the saddle, but it can be used in a variety of advanced ways. The Hydra can be used in ascent systems, lanyard systems, fliplines, or as a redirect. In any configuration, the use of the ROOK is greatly enhanced by the flexibility to add multiple connections and rotate when needed.