According to Reference.com "Brass knuckles are legal in many states, but they are illegal in California, Michigan, Illinois and Vermont. South Carolina only bans brass knuckles if they are used with the intent to commit crimes. Other states only ban metallic brass knuckles or apply age restrictions to ownership of them. However, most states classify brass knuckles as concealed weapons that require permits."

This kitty cat self defense keychain has sharp edges. Put your fingers through the eyes and/or the ears and the this kitty can be used against an attacker.