Allows you to go from lowering to raising without changing hardware. High-efficiency pulley, with an integral rope-grab mechanism, allows it to be used as a lowering device on the main line and belay line systems and be quickly changed over to a raising system without switching out or replacing hardware. Combination of essential features into a single device simplifies on-scene rigging, expediting the rescue. Increases user safety with reduced weight, fewer components, faster rigging, quick changeovers, simplified training and lower risk. UL® Classified as a pulley, descent control device and belay device.