OK, what is this thing. Sharp brass knuckles? A tool of some sort

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What are some good 3D printed self defense tools (non firearm) that is easily printable? : r/fosscad

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Fascinating and Widely Practiced Uses of Brass Knuckles

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Why are brass knuckles considered an effective weapon? Won't their

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Curious if anyone acrually incorporates brass knuckles into their EDC? : r/EDC