If its a sterno trivet, (or ANY trivet for that matter) why would you need a wood handle?
To me it would just get in the way, both in use and in storing it.
Defintely not a brewing tool, cant think off how you would use it in that capacity.
If it were made of cast iron or steel, might be a rad way to mark small steaks. lol
And it appears too small and light weight to "beat" or "pound" anything, like in tenderizing.
Cant "spin it", not with that handle sticking out. Same with "rolling it" on something, like dough.
Submitted for your approval, a trinket from the twilight zone, fer sure. /img/vbsmilies/smilies/lookaround.gif
I think it is (a sample) part of a structural post extrusion for connecting panels, like the following post connectors:
I know, it's a self-sealing stem bolt. So that's what they look like. /img/vbsmilies/smilies/lol.gif
Seriously, Id agree its a good chance it's been re-purposed, adapted with a makeshift handle and dumped in a drawer,
probably never to be used again.