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After much anticipation and patience the ISC D4 has finally arrived. This brilliant new device is sure to revolutionize the way the industry views rescue descent devices. It is loaded with features and functions sure to appeal to the most discerning of rope technicians.

The D4 is rated for 2 person rescue without a supplementary brake. The operator can tail the rope over the nose of the device or the traditional side wave to give 2 different friction rates through the device. The cam can easily be “thumbed”for easy tailing of rope on inclines or when approaching the edge. Like all ISC product, it is tough as nails!

It is approved to EN12841, ANSI Z359, NFPA 1983- meets the requirements of EN341.

It has a 5kN slip load and is rated to a maximum operator weight of 240kg.

Height (mm) 140
Height (inches) 5 1/2
Width (mm) 82
Width (inches) 3 1/4
Thickness (mm) 98
Thickness (inches) 3 7/8
Weight (grams) 655
Weight (ounces) 23
Compatible with rope diameter (mm) 10.5-11.5mm (7/16″)
Panic brake Yes
Number of persons 2
Body material Aluminium
Cam material Unknown
Body finish Anodised
(MBS) Minimum Breaking Strain (kN) 16
(MBS) Minimum Breaking Strain (lbf) 3597