I read about this knife and it's amazing! It's made for scooba divers and people who might have a close encounter with bears and this is how it works. IN the handls there is a tank of C02 and there's a tube in the blade that goes from the c02 cartridge out to the front of the blade. So you stab it into something and then pressa button that releases the co2. That's 40 square inches of freezing cold C02 being released at 800 pounds per quare ince inside a victim. Just imagine the wound, adn if that's not enough it freezes all flesh and organs. That comes in handy underwater, because the blood doesn't spread and attract sharks. Everytime I think of this designe it amazes me.
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