Have confidence in a pen that always works with the Fisher Trekker Space Pen. The Space Pen can function in extreme temperatures, on oily surfaces, and in wet conditions. It can even write under water. Furthermore, it can hang upside down indefinitely yet still function whenever you need it. In addition, the Fisher Rubber Comfort Grip makes it comfortable for anyone to use. The key ring attachment on the posi-lock cap makes it convenient to grab at any time. Likewise, it comes with a break-away lanyard and carabiner, which easily attaches to your belt, backpack, climbing gear, and more. This durable pen can withstand daily abuse no matter where you keep it. Finally, you can get one complimentary line of engraving on this pen, making it a great keepsake or gift.