This item is marked Oxwall, Japan.  The two holes in the ends are for screwing it to a bench (or a board).  The holes in the middle are for short steel pegs (missing).  It is a tool, but not a wrench.  If you know what it is, just say "I know", and lets some others guess.  I don't know how uncommon this item might be.

I know, my father had one.

I know.  Used mine many times.

I'm not tellen

Got two of 'em.

I suspect. 

I know.

BTSOM.  never had a workbench or anything like that as a kid, and my dad didn't either.   no idea.

Wire bending jig.  Mine's not marked Oxwall, but it wasn't expensive, since it followed me home from a yard sale.

Got 2 and still use them regularly.

Yes, wire bending tool, not much to look at but very handy.

Wire bending jig. I bought mine from Lee Valley a few years ago. Inexpensive and comes in handy. Great for making custom hooks for the pegboard.

I know. have one similar in size plus 2 bigger ones.

Thanks - I can see that now (with the pegs removed).  duh.

Checked them out on YouTube and learned a lot.
Thanks for cluing us in.