A 3D printable knuckle duster, watch out!
The knuckle duster dates back to ancient times, and has been used all around the globe as a weapon for many hundreds of years. Brass, cast iron, lead, and wood knuckles were made during the American Civil War in the 19th century in America. During this time soldiers would purchase cast iron/brass knuckles, carve their own from wood, or cast them at camp by using a form in the soil and melting lead bullets. Hardcore!
Made possible by the Designers Exchange.