D4 Descender - ISC

NEW D4 Work/Rescue Descender, an evolutionary development in the world of descenders! After hundreds of hours of trials, evaluation and feedback, eventually more than two years later we have officially launched the NEW D4 Work/Rescue Descender.

The D4 has a 240kg (500lb) Working Load Limit which means it is suitable for two-man rescue on ropes of 10.5mm-11.5mm (7/16"). It features a unique and innovative progressive cam action, which offers precise control at slow or fast speeds. The progressive cam works by way of one cm operating inside another cam.