In Chinese philosophy, Tao means "the way," the fundamental or true nature of the world. And appropriately, these pens reflect the current state of today's world, in which a sudden, unforeseen physical attack can come at any time.
Allen notes, "These pen designs are evolutions of the custom tactical pens I have offered successfully for many years. However, they are very different from the other aggressive-looking pens and kubotans on the market, that is, they do not look threatening, but are useful high-tech writing instruments with a stylish and futuristic design. If the user is threatened or attacked, the pens can be used at three levels of defensive force, depending on the type of threat.