
Insert a wire into the area where S&A shows the red arrow. I suspect that these are for gripping a wire and pulling it.Can we see an end picture? Looking down into the hinge (see red arrow)?
Also, that is a very nicely finished rivet. There must be a reason they made it that nice.
I almost thought it was a can opener, but the orientation of the "cutting" part is wrong. Plus you wouldn't need the tab on the handle (for presumed leverage).