Not sure whether it's auto, farm or other related. So figured I'd see if the knowledge base here has any info on it. I have a couple of these, this being the better one. Be nice to attribute it to something.

Looks like cream seperator to me. Very similar anyways.

That one does not have to be a wrench, it could be a part.

I had a tool like this to turn back brake calipers. It didnt have the wrench end just the large side.

This may be a place to start.