FistHammer: Knuckle Duster & Window Breaker

Material: zinc alloy

Weight: about 38g

Features: product neutralization of male and female universal. Comes with more than 20 cm long hanging chain, can be used as a personalized clothing pendant, sweater chain. Emergency can be worn in the middle finger defense. Does not affect their own safety premise, can also be used as a broken hammer to break the window lifesaving!