worst spread wrench I've ever seen

[rust in the eye]

Must have been one hell of a bolt to permanently deform it this badly. It's north of 11/16" at the tips. Given the steel must have rebounded some I can't quite grasp what was going on here.

 

[Steel_Rain]

A pipe on the other end did that.

 

[blazemaster83]

Sometimes you cant use the box end and it's really tight! This is my excuse for having lots of wrenches.

 

[ChevyEFI]

I regret not keeping a picture of an OEX12 that went to warranty. But not having the new one.

 

[rust in the eye]

A pipe on the other end did that.

Oh, agreed 100 %. It's so wide it would have slipped way before this. I have to wonder if it wasn't then employed on a larger size with same force. The wrench is discolored, perhaps from fire. I'm wondering if that's the case and it lost it's tempering.
After whacking it a few times with a 3# hammer the end closed up again.

 

[seber]

More likely used as a box end with another wrench on the open end for leverage.

 

[Snaparxon]

If it were an older MAC or Cornwell it would have broke. Impressed!

 

[rust in the eye]

More likely used as a box end with another wrench on the open end for leverage.

BINGO! This makes the most sense as the open end would have slipped WAY before opening this wide. Not a practice I often employ so didn't even cross my mind.

Kudos to much maligned Craftsman, the box end is quite intact so seemingly survived the abuse.