Meet the CRMIPT: a versatile self-defense tool designed to get you out of tough spots. The CRMIPT is a non-lethal close range self-defense tool that retracts and expands to let you trap, control, take down, and restrain attackers. It comes with a seat belt cutter and can be used as a glass breaker as well.
The above video shows the CRMIPT in action. As you have probably guessed, you are going to have an easier time using one of these if you train with one for a while. You can find out more information here.