It looks kind of route-specific / very, very niche: You need a quite skinny flake, attached either too far away or too loosely to the main wall to put normal ca

It looks kind of route-specific / very, very niche: You need a quite skinny flake, attached either too far away or too loosely to the main wall to put normal cams or big bros in behind it, all without any other reasonable protection nearby. And if the flake is so loose that you're really worried about pulling it off the wall, running it out might actually be the safest thing to do. (That way, if you fall, you won't load the flake with your momentum. This gizmo will load it strictly downwards, which is the whole reason it's being used instead of normal cams -- which will pressure the flake out from the wall in a fall.)