When it comes to being prepared for anything, the Aucon Tenax Pen is the perfect tool to have on hand. Made of durable aluminum, it's lightweight and easy to carry, with a lanyard hole that makes it easy to take with you wherever you go. The screw-on cap provides a secure seal, and the blue plastic inlay adds a touch of style. But what really sets this pen apart is the Fisher Space Pen cartridge that ensures a smooth writing experience, no matter what the conditions. And when the lights go out, the GID glow blue end cap allows you to see the pen in the dark. With its 4.25" overall length, the Aucon Tenax Pen is a must-have for a true survivalist.