Customer Service: (800) 268-2141 (M-F 7AM to 5PM)
Customer Service: (800) 268-2141
(M-F 7AM to 5PM)  Contact || Help
Ascension group logo
wesspur youtube logo
wesspur instagram logo
Facebook logo
wesspur newsletter icon
Free Catalog of Tree Climbing Supplies and more
Free shipping on tree gear
Your shopping cart: Items, Total   View Cart or 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

Free shipping on this tree gear No-hassle returns on tree gear

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

Contents of this site are copyright 2010 by WesSpur Tree Equipment, and may not be used without written permission.