Customer Service: (800) 268-2141 (M-F 7AM to 5PM)

Login or change user || View Account

Your cart: Items, View Cart || Checkout

ISC D4 Work/Rescue Descender image

ISC D4/D5 Work & Rescue Descenders

(Rollover thumbnails to change pic, click to enlarge)
ISC D4 Work/Rescue Descender ISC D4 Work/Rescue Descender ISC D4 Work/Rescue Descender D4 Descender Diagram

ISC D4/D5 Work & Rescue Descenders

Buy ISC Work/Rescue Descenders

D4 - 7/16” (11mm)
ASC225
D5 - 1/2” (12.7mm)
ASC232

This Descender from ISC features some unique features for a handled descender. The handle is aluminum and coated for grip, and designed to rotate 360°, making it easier to use and switch between allowing the rope to run and locking the device. Each station in the rotation is accompanied by a “Click” so that you have the audio feedback in addition to the feel of switching the position. Features an anti-panic brake if the handle is rotated too far by an inexperienced user.

These devices have great video and manuals on the tabs below.

D4 Details: 5 1/2” x 3 1/4”, weighs 23 oz, and works with ropes from 10.5mm to 11mm (7/16”).

D5 Details: 240 kg/500 lb WLL, weighs 29 oz, and works with ropes sized 12.7mm (1/2”).

ASC225, ASC232

This Item Ships free!* No-hassle Returns Ask A Question

Customer Reviews

Rated: Disappointing Review by:

“ I purchased this as a climbing descender. I think the "descend" position is to small and it goes into the "panic" position too easily. I can't keep it out of the "panic" position when trying to descend. Very frustrating. My buddy purchased one about the same time, and he fells the same about it. I wish it could be modified to make the "descend" position a larger area. ”

Additional Features

  • 360° handle rotation
  • Anti-panic brake
  • Suitable for 2-man rescue
  • No Plastic in handle!
  • Clear handle positions
  • Simplified operation
  • 5 kN slip load
  • Max user weight < 500 lb (240kg)
D4 Manufacturer : ISC
Made in : Wales
Min Rope Diameter (inches / mm) : 3/8” / 10.5mm
Max Rope Diameter (inches / mm) : 7/16” / 11.5mm
Working Load Limit : 500 lb (240 kg)
Minimum Breaking Strength : 3,597 lb (16kN)
Construction : Aluminum body & handle, stainless steel cam
Weight : 23 oz / 655 g
Height : 5.5” / 140mm
Width : 3.25” / 82mm
Thickness : 3.875” / 98mm
D5 Manufacturer : ISC
Made in : Wales
Max Rope Diameter (inches / mm) : 1/2” / 12.7mm
Working Load Limit : 500 lb (240 kg)
Minimum Breaking Strength : 4,946 lb (22kN)
Construction : Aluminum body & handle, stainless steel cam
Weight : 29 oz / 818 g

Safety & Technical Information

Certifications

  • EN12841
  • ANSI Z359
  • NFPA 1983
  • Meets requirements of EN341

ISC D4 Work/Rescue Descender Files

ISC D5 Work/Rescue Descender Files

Email Newsletter

Free WesSpur Catalog

Customer Service

WesSpur Facebook Icon WesSpur YouTube Channel Icon WesSpur Instagram Icon