4x4s are too big for the saw in my Leatherman or SAK. If you are near a lot of wood post construction, this might not be a horrible thing for the bug out bag.

I wonder if you could get a metal grade blade set up like this. I've seen chain-type saws that can do aluminum and maybe steel.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.