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Why are brass knuckles considered an effective weapon? Won't their sharp edges dig in the hand of the punch-thrower and hurt/incapacitate them quickly? - Quora

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Is it possible to make our fists as hard as steel? Would this allow us to use them for self-defense, like using knuckles, but without the risk of breaking them every time?

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Why are brass knuckles considered an effective weapon? Won't their sharp edges dig in the hand of the punch-thrower and hurt/incapacitate them quickly? - Quora

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