D4 Pro



MAX ROPE CAPACITY11.5mm (7/16"+)

Feedback gathered from highly qualified and experienced 'Pro' users highlighted a demand for a device which does not incorporate a panic-brake function. Enter the D4PRO! The D4PRO Descender is the same great Work/Rescue Descender, but without the panic brake.

This can be particularly useful on longer descents and in rescue/belay applications, where a broader 'sweet spot' is welcomed.

Features & Benefits

  • 360° handle rotation
  • Suitable for 2-man rescue
  • No Plastic in handle!
  • Clear handle positions
  • Simplified operation
  • 5 kN slip load
  • Max user weight 529 lb (240kg)


  • Manufacturer : ISC
  • Made in : Wales
  • Minimum rope diameter: 10.5mm (3/8")
  • Maximum rope diameter: 11.5mm (7/16")
  • Working Load Limit: 240 kg (529 lb)
  • Construction: Aluminum body & handle, stainless steel cam
  • Weight: 676 g/ 24 oz


  • EN12841
  • NFPA 1983

NOTE: As the D4PRO does not incorporate a panic-brake, it is not possible for the device to fully meet the criteria of ANSI Standards. The D4PRO is fully certified to EN 12841 (a panic brake is not a compulsory criteria of this standard).

If you require a Descender which fully meets ANSI standards, please see RP880 D4 Work/Rescue Descender, (with incorporated panic-brake).

Notes Rated load 240kg (550lb). This rating is achieve WITHOUT the need to add additional friction to the system.

Ratings & Reviews

1 review

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8/20/2023 10:45 am

Great device

by Micah -

The best rescue device/descender I have used