Meet the Yoogo: a keychain for self-defense. This multipurpose keychain can get you out of trouble when someone attacks you. It helps you punch, hook, slash, and stab with more confidence. It is compact and discreet but protects your hand on impact. Yoogo sits comfortably between your fingers as it has an ergonomic design.
The above video shows how you can use a Yoogo to protect yourself.