Pen knives look and write like an ordinary pen, but feature a hidden 2.13" blade that is revealed by pulling the pen apart. Pen knives are available in Black, Silver, and Gold. These are "take anywhere" self-defense weapons.

They look and function like a nice business quality pen. If needed the knife and be unsheathed very quickly. Put one in your purse, keep one in the glove compartment of your car, and another on the nightstand.