Are ninja key chains legal to have carry and use for personal defense in the state of Illinois?

No, ninja key chains are not legal to have or use for personal defense in the state of Illinois. According to the Illinois Knife Act, it is illegal to carry or possess any knife with a blade length of 3 inches or more, unless it is specifically allowed by law. Ninja key chains typically have a blade length of 2.5 inches or more, which is longer than the legal limit. Additionally, ninja key chains are considered to be a type of dangerous weapon, and it is illegal to carry or possess a dangerous weapon in Illinois without a valid license.