One Finger Knuckles / knuckle-duster another version

thingiverse

One Finger Knuckles 2.0 Fist-load weapons like one finger knuckles are used in hand-to-hand combat. They're pieces of metal shaped to fit around your knuckles, often made from metals other than brass, plastics, or carbon fibers. Designed to concentrate a punch's force by directing it towards a harder and smaller contact area, they increase tissue disruption on impact, making it more likely to fracture the intended target bones. The extended palm grip spreads across the attacker's palm the counter-force that would otherwise be absorbed primarily by their fingers, reducing the likelihood of finger damage. This version has a special hole for wearing around your neck with a string