This pen isn't just for writing! It is used by security guards, police, military, shoppers, joggers, and delivery workers! You can open boxes, etch on wood, metal, or glass. It has a ‘real’ glass breaker tip that can shatter a car window. This pen can also make you feel safer especially in areas where weapons are prohibited. When making a list of safety supplies, its best to start with a great Tactical Pen!