ISC D4 Work/Rescue Descender RP880 The ISC D4 Work/Rescue Descender RP880 is a professional double-stop descender designed for rope access, rescue, work positioning and emergency hauling applications. Built for demanding environments, the D4 combines controlled descent, auto-locking security and smooth rope handling for users working at height. The D4 features an auto-lock function that activates when the operator releases the handle, alongside a panic brake that is designed to remain controlled and predictable during normal use. Its progressive cam action allows precise control at both slow and faster descent speeds, making it a versatile choice for professional work and rescue systems. Key Features ISC D4 Work/Rescue Descender RP880 Double-stop descender with auto-lock function Auto-lock activates when the handle is released Panic brake designed for controlled operation Progressive cam action for smooth speed control Super-hard solid stainless steel cam Highly wear and corrosion resistant Suitable for rope access, rescue and work positioning Can be used for smooth ascending or emergency hauling in suitable systems Rated load of 240kg / 529lb Double-Stop Safety Function The ISC D4 is designed with a double-stop function, helping provide controlled descent performance. If the operator releases the handle, the auto-lock function engages to help stop rope movement. Progressive Cam Control The D4 uses an innovative progressive cam action, where one cam operates inside another. This design provides smooth, precise control across slow and faster descent speeds. Durable Stainless Steel Cam The cam is made from super-hard solid stainless steel, providing excellent wear resistance and corrosion resistance for professional rope access and rescue use. Rescue & Hauling Capability The D4 can be back-fed easily, allowing it to be used for smooth ascending or emergency hauling when configured as part of an appropriate 2:1 Z-rig system. High Rated Load With a rated load of 240kg / 529lb, the D4 is a true work and rescue descender suitable for demanding professional applications. Technical Specifications Specification Details Product Name ISC D4 Work/Rescue Descender RP880 Device Type Double-stop work/rescue descender Cam Material Solid stainless steel Compatible Rope Range Typically 10.5mm / 11mm ropes Rated Load 240kg / 529lb Minimum User Weight 60kg / 132lb Standards CE, NFPA T, ANSI Z359.4 Ideal For Professional rope access work Rescue and emergency rope systems Work positioning applications Controlled descent and lowering Emergency hauling in suitable Z-rig systems Users needing a durable double-stop descender Explore More Descenders & Ascenders Climbing Equipment Climbing Ropes Carabiners & Connectors Arborist Guides & Advice Best For The ISC D4 Work/Rescue Descender RP880 is best suited to rope access and rescue professionals who need a controlled, durable and high-capacity descender for demanding work at height. Why Choose the ISC D4 Descender? With its double-stop function, progressive cam action, stainless steel cam and 240kg rated load, the ISC D4 delivers dependable control for professional work and rescue rope systems.
