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International Safety Components (ISC) RAD RP815


Front Rear
Front Rear
Left Side View Right Side View
Left Side View Right Side View

Technical Details

I acquired my ISC RAD RP815 from Buffalo Gap Outfitters in 2017.

My ISC RAD RP815 is 74 mm. long, 112 mm. wide, 34 mm. high, and weighs 301 g.

The RAD consists of two 2.8 mm. aluminum alloy plates bolted together with a with a cam assembly sandwiched between the plates. One end of each plate is bent inward, where a 20 mm. wide, 15 mm. tall hole in each plate align to form an attachment eye. The top of the plates are geld together by a set of machine screws and a spacer on the left and a double-ended shoulder rivet on the right. These connections double as rope-guiding bollards.

The cam is stainless steel, and is mounted on a 3.7 mm. aluminum alloy plate. The cam is circular with a flat cut on the base. It is 42 mm. in diameter, 115 mm. thick, and gas a 2.1 mm. deep U-shaped groove around its circumference. The axle is a shoulder rivet set off-center to the cam and riveted to the rear plate. The cam has a projection that fits into an arcuate slot in the cam plate, so the cam is free to rotate with respect to the plate within limits set by this slot. A spring-loaded folding lever is attached to the cam plate.

The front of the RAD is printed with "RAD," "Manufactured in the YUK by I|S|C," a rigging illustration, "Ø," "EN12841-C:06," "MAX 200kg, "11.0," EN358:00, "10.5-12.7," "15/64679/22," "CE 0120," and a book-with-an-"i" icon.


"RAD" stands for "Rope Adjusting Device." Initially I thought it might be a descender, but the instruction sheet does not describe it as such, listing these various functions:

Although not listed as a descender, I wasn't completely insane: the back of the package calls it the "RAD RESCENDER." One feature would discourage its use as a descender: it cannot be quickly rigged to the middle of a rope.

Rigging the RAD requires removing the top left button hex screws and swinging the front plate open, inserting the rope, and then closing the plate and reinstalling the screw. The screw is tiny and could easily be lost in the field. I recommend rigging it on a clean workbench.

The rigging method explains the deed for the notch in the front plate.

I'm not sure why the flat area on the bottom of the cam is necessary.

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