D4 Descender

An innovative new descender device for rope access and rescue

A red rope descender device attached to a coiled white rope on a white background.

The Project

This project was delivered in partnership with ISC. The D4 descender is a new variant of a device that is used in rope access for moving up and down ropes for two people in rescue scenarios.

Close-up of a metal climbing device with an engraved anchor symbol, the letters ISC, and a directional arrow, mounted on a red aluminum component.
Two people stand at a chalkboard; one writes a diagram labeled MYS NAME with a marker while the other observes.
Three men in a conference room review documents on a table, with a large screen displaying a website in the background.
A person in a red jacket uses a stereo microscope at a workbench, examining an object with tools and materials nearby.

Design

We worked in collaboration with ISC to take the project from early stage concept through to production. This product has been available for purchase for several years and is highly reviewed.

Close-up of a red D4 ISC RP880 rope descender device attached to white rope, showing product details and specifications engraved on the device.