Your TacPen will allow you to break your car window in the event of an accident. The sharp knife can be use to cut and free yourself from a stranded seat belt. The Mini Mag-light can be useful if you need to change your tires on a dark road. Lat but not least it's always useful to have a ballpoint pen. Make sure the pen is stored within arm reach of the driver in your car! It can also be a useful self defense solution. Batteries for the Tactical LED are included.