The Boker Plus Tactical Pen is a superb writing and self-defense implement with a hard, rounded stainless steel insert on the shaft end, which allows it to be used as a Kubaton. This model features a blue anodized aluminum handle with a checkered grip and cap to provide a secure grip. The cap is precision threaded and is secured by an internal o-ring. To write, the optional cap can be easily slipped back to the stylus.