Knife like object made from a wrench

[Josh Carrasquillo]

I came across what I would describe as a knife like object made from what appeared to be an old craftsman wrench. Anyone know if it's even possible to heat treat a wrench? They do look interesting.

 

[n7titan]

I don't see why it wouldn't work. It might not be as good as the super steels, but 99% of people can get by just fine with 440. Some of these tool steels would probably be just fine as knife steel anyways. It all depends.

Railroad Tie

Various Tools

File Knife