I haven't seen one of these in a few days, so I thought I'd toss in one of my own.
It's meant for via ferrata to reduce the impact of falling on static gear. You loop a short rope through the holes and it absorbs the forces of the fall by friction of the rope slipping through. This is the Kong Kisa.
You run your shoestrings through it so you don't have to tie em
There was a scale with it, but it gave a pretty big hint as to its use, so I cut it out.
It's about 5 or 6 inches long, so you would need some thick laces to use it that way.
Oh, yeah. I was imagining it much smaller