ISC D4 Descender 11mm Protos Helmet Accessories » mesh tissue at the

» mesh tissue at the waist improves ventilation

5 teeth per inch

External Diameter: 108mm

DMM Boa Auto-Lock Carabiner

DMM Shadow Auto-Lock Carabiner

ISC D4 Descender 11mm Protos Helmet Accessories » mesh tissue at theISC D4 Descender. The NEW D4 Work Rescue Descender features a unique and innovative cam action, which offers precise control at slow or fast speeds. The progressive cam works by way of one cam operating inside another cam. The D4 has a 240kg (500lbs) Working load limit which means it is suitable for two man rescue, without the need for the creation of extra friction. The handle mechanism is designed to rotate through 360 making its use easier and