Tactical pens are the perfect combination of cubotan and writing pen. Sophisticated design makes such a pen the perfect defense device. Its inconspicuous gives you a moment of surprise and therefore an advantage over the attacker, because he does not know that you will have something similar with you and also mental security, because although it does not look like, you are "armed".
Since tactical pens are pens and can be written with them, that is obvious. It has a classic telescopic tip as well as a ballpoint pen. The cartridge is replaceable.
The other side of the pen is the offensive one. (Yes, we can even attack with the writing side, constructionally will hold it.)
Each manufacturer places here a different ending, for example, some have an attack tip, another rounded in the style of cubotan. There are also special endings that are designed to break windows, or to remove and preserve DNA (a special crown catches DNA in the form of blood or tissue when it strikes - this makes it easier to identify the attacker).