A 3D-printed brass knuckle is a compact and ergonomic self-defense tool, created through additive manufacturing with durable plastic or resin materials.

It features highly reinforced impact points for each finger loop, designed to withstand significant force.

The structure is built to be lightweight yet highly resistant, making it both functional and durable. The surface is shaped for a secure grip, and the overall design can be customized for aesthetics or additional features.

Let me know if you’d like any other changes! not a joke!!