First, the pen of aircraft-grade aluminum and features a “glass-breaking” tip, so if you’re in a vehicle or building, you can make it quick escape in a dangerous situation. In our experience, the glass breaking tip actually worked quite well, although it took a few tries to shatter thickerDefender X Tactical Pen glass.Second, the Defender X has a flashlight on the end that is surprisingly bright. We’ve already reviewed several tactical flashlights, but surprisingly, the Defender X was almost as bright. It wasn’t quite as blinding as say the but it certainly was bright enough to ward off an attacker.Finally, the Defender X can actually be used as a regular pen. It’s usable in all conditions, so if you’re lost in the woods, you can take notes as to your position or mark landmarks, etc. http://www.alvenaandduaderma.com/defender-x-tactical-pen-reviews/