Keeping a pen on hand can be valuable and save you some time. But with all your other everyday carry gear, it can sometimes be a bit cumbersome and inconvenient to have it floating around in your pocket. The TEC Accessories Pico Pen is small enough to fit in your pocket and can be attached to your keyring for added ease. And the rare-Earth neodymium magnet in the cap will assure that the pen stays affixed to your keys when you aren't using it.