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.
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