Originally Posted by
Chuckk
Yeah, they're threaded to take the skewer and hold the stack tight.
Then you find a road sign or safety barrier and use the horns on the edge of the immovable object while you give the wheel a twist like putting the tool in a bench vice at home.
Oh, thanks for the explanation. I suppose one could convert any freehub tool using a welder to add the "horns", although not quite as compact.
One could also do it to a cassette tool, but one would still need the chain whip. But, perhaps one could make a flat cassette tool to squeeze in between the dropouts and grab the chainstays like the Pamir tool above. Then just pedal forward while fixing the lockring to remove the cassette. Locking the cassette could be done by spinning the wheel backward.