The artistic skeletonised design significantly reduces the weight of this tactical pen without compromising the strength. The lid securely screws on and is o-ring sealed and incorporates a wire pocket clip for convenient carry. The refill is a Fisher Space pen, which will write in the wet, upside down and if you ever find yourself in zero gravity you will have no trouble recording the experience with your KT5513A Tactical pen. Defense and rescue incorporated in an artistic design. Only the best materials were used for the production of this Tactical Pen, which can be used as a Kubotan, glass breaker or a simple ballpoint pen. The tip is something very special, a strong Nano-Ceramic striking tip which has the necessary hardness to be able to smash car windows with ease and aid in self defence.