All comments must be civil and helpful toward finding an answer.

It looks like the tool that is included in a new light fixture. It is a wrench to tighten the nut that holds the glass part in place.

Solved!

Interesting, I’ll have to pursue that direction and see if that’s what it is.

Looks like a wire nut ?

A wire nut from a giants house

What’s a wire nut and why would I have this?

Looks like a tool to remove the rings that hold glass lamp shades on….

Solved!

My title describes the thing.

If you can post a pic of the inside I can tell you

Does this help? It’s really hard to get a pic of the inside opening, lol.

It’s the wheel insert for a installing the wheels on a vac with larger holes.

Interesting, I don’t have wheels on my shop vac, but I’ll keep it in there in case I ever buy them, thanks!