Here's something that will hopefully be a bit more challenging.  The brand is Snap-on and it's now an obsolete tool in the sense it's no longer made. Whether it's still useful or not is another matter.

I'm going with a belt tension release tool.

I'll up the ante and say ift was part of a strap wrench rig.  I've got an old Bonney rig like that with only one nub on the non-drive end, but I'm pretty sure it was for removing studs.  Unless my perspective is off, the fully open position doesn't look like it would be wide enough for any belt ewxcept maybe a serpentine belt(and I'd think there would be a market for that these days).

Good thing guessing doesn't cost you brownie points on this forum, cuz I'd lose a lot of money playing Jeopardy!!

DM&FS

To flatten the clamp divot in an exhaust pipe or muffler so that it can be reused.  The knurled part goes on the inside & is turned with a ratchet after tightening it towards the smooth roller.  A little heat on the pipe first also helps. 

Quote from: geneg on July 15, 2012, 08:57:25 PM
To flatten the clamp divot in an exhaust pipe or muffler so that it can be reused.  The knurled part goes on the inside & is turned with a ratchet after tightening it towards the smooth roller.  A little heat on the pipe first also helps.

That's a voice of experience there!

Quote from: geneg on July 15, 2012, 08:57:25 PM
To flatten the clamp divot in an exhaust pipe or muffler so that it can be reused.  The knurled part goes on the inside & is turned with a ratchet after tightening it towards the smooth roller.  A little heat on the pipe first also helps.

Winner there.  Snap-on A215 Pat 3347075. First appearance in the 63 catalog.

It's a small green alien.  Not sure where he went in all those other pictures.

He is there. You just can not see him.

Gang,

For your information-- JAFE has become known as the "Wizard Of Odd" over on the Garage Gazette.  These obscure tools he keeps posting have become his trademark.

Quote from: lauver on July 23, 2012, 09:48:46 PM
Gang,

For your information-- JAFE has become known as the "Wizard Of Odd" over on the Garage Gazette.  These obscure tools he keeps posting have become his trademark.

And here I was thinking he was known for JAFE juice!

are you saying J,A.F.E. is a little odd? before we say that to a tool man we have to remember  normal is odd to a tool perdon   LOL bob w.  bob w.

And odd is our normal!

One of my favorite tools I actually just repaired one about an hour ago. Its used to clamp down onto exhaust pipe attatch a 1/2" ratchet or breaker bar to it and bring the pipe back to a true round. Have fun :}

I don't understand why it's obsolete. Seems pretty handy to me.

Great tool! Does anyone still make them?
""Snap-on and it's now an obsolete tool in the sense it's no longer made""