ISC D5 Work - Rescue Descender
ISC D5 Work Rescue Descender
The D5 from ISC is a double stop rope access descender built for industrial height safety, rope access, edge management, arborists and search and rescue. Its auto lock function holds you in place whenever the handle is released, and a panic brake locks the device if the handle is pulled too far, so it protects the user at both ends of the travel.
When the device is loaded, the side plates cannot be rotated open, thanks to the position of the karabiner and a push button safety closure, yet it is still easy to attach or detach from the rope without unclipping from your harness. The rope can be back fed for smooth ascending or for emergency hauling as part of a 2:1 Z-rig, and the 360 degree rotating handle clicks when it engages. It runs on 12.7 mm to 13 mm low stretch kernmantle rope, carries a 240 kg working load limit for up to two people, and is certified to EN 12841:2024-C and to the requirements of ANSI Z359.4 and NFPA 1983. ISC set a minimum user weight of 60 kg and publish a 5 kN slip load. Browse more descenders, the wider rope access range, or the full ISC range. It pairs with the Sirius compact descender and the Ferno FDU descent device.
Key Features
- Double stop rope access descender with auto lock
- Panic brake locks if the handle is pulled too far
- Side plates cannot open when the device is loaded
- Attaches and detaches without unclipping from the harness
- Back feed rope for ascending or 2:1 Z-rig hauling
- 240 kg working load limit for up to two people, certified to EN 12841:2024-C
- Minimum user weight 60 kg, 5 kN slip load
Specifications
| Brand | ISC |
| Type | Double stop work and rescue descender |
| Rated load | 240 kg working load limit, up to two people |
| MBS | 22 kN |
| Rope | 12.7 mm to 13 mm low stretch kernmantle |
| Standards | EN 12841:2024-C, meets ANSI Z359.4 and NFPA 1983 G |
| Weight and SKU | 818 g, VISC RP885A1 |
| Minimum user weight | 60 kg |
| Slip load | 5 kN |
| Cam material | Stainless steel, anodised finish |
| Traceability | Individually serial numbered as standard, ANSI compliant version as standard |
Product Documents
What is a double stop descender?
A double stop descender locks in two ways: it holds when you release the handle, and a panic brake locks it if the handle is pulled too far. That protects the user whether they let go or grab in a panic.
Can the D5 be used for hauling?
Yes. The rope can be back fed through the device for smooth ascending or for emergency hauling as part of a 2:1 Z-rig, so it works within a rescue system as well as for controlled descent.
What rope does it take?
Run it on 12.7 mm to 13 mm low stretch kernmantle rope. ISC give 12.5 mm as the lower limit on their own data sheet and Ferno give 12.7 mm, so the copy takes the tighter figure. It carries a 240 kg working load limit for up to two people, with a 60 kg minimum user weight, and is certified to EN 12841:2024-C.
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