Brass Knuckle Knives: How Are They Made?

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Ohio law now permits hidden knives, possession of brass knuckles

What are The Basic Butterfly Knife Tricks?

Knuckle Dustin' - Knife & Gear Society

US M1 1918 Trench Knife - L.F.&C. - Epic Artifacts

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DIY Knuckles Knife! Aluminum Casting