I recently picked this up at a garage sale along with a bunch of vintage auto body repair hammers, dollies, WILTON vise and others.

It measures 13 1/2" overall and a little over a 1/2" opening on all. The handle rotates freely and is made of aluminum along with the bolt inside it I believe. What would this have been used on, any ideas? Thanks

Well, now, you win the grandmaster prize for the Oddest whats-it that is supposed to be a tool and isn't....

What you have there would be very handy to have....if you were flying over europe in , say 1945....in fact, if you left home without it, you would be in big trouble....

It opens the Bomb bay doors in a B17

WOW!! Rusty, you probably made his day!

I was going to take a stab and guess it was a handle of some sort rather than a wrench. Quite a piece of history there.

Wow! That is bad ass, my dad actually thought it might have been used on a plane as a tool perhaps so he was pretty close.  I thought the B was actually an 8 so I was thrown off at first and was an idiot for not thinking about it but thanks rusty for the ID. I'll have to take some pictures of some the tools and hammers we got as well. There is a few logos I can't make out or figure out which company they were from. I have one auto body repair fender bumper hammer with an old carriage stamp on it but looks like someone did a custom handle welding job on it with a piece of round steel.

Now that is cool!!!!!!