The curved blade is right off of an aircraft crash axe.

It looks like somebody took an extrication tool and added a bunch of features onto it to make it more usefull for day to day stuff. I'm no trucker, but I'd be real nervous about hacking away ice with a metal faced hammer or axe edge on my vehicle.
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Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane