Mini portable metal brass knuckles duster boxing training fitness combat window breaker outdoor safety and defense EDC tools

Specification: height (from arc surface to bottom):50mm width (boxing surface):93mm thickness (boxing surface thickness):17mm Palm width: 77mm finger hole diameter 24mm
Weight: about 126g
Material: zinc alloy
Function: martial arts equipment is self-defense and life-saving, outdoor self-defense and standby defense. It can be mastered almost without special practice. It is a very practical product.
Note: This is a small size