There are maniacs everywhere. And it seems that they get crazier and crazier every year. These days, you have to be a martial arts master to defend yourself and your family. (And I strongly advice you to start practicing some martial art, or self defense class.) But, until you learn how to defend yourself and the ones you love, you can learn how to use everyday objects as a self defense weapon. Or tool, if you prefer. Here, I'll show how to use a key to defend yourself from the attacker. I hope that it would be useful, and I hope that you'll never need this. So, what do you think? Is this seem like a useful thing? Do you have some ideas that you would like to share? Leave a comment bellow and share your thoughts. And don't forget to share with your friends. Maybe your share will help some of them.