Ferrocerium Rod
From Ice Age Farmer Wiki
Firesteel, or Swedish Firesteel, is a man-made metallic stick (ferro-rod) that was developed for the Swedish army. It works similarly to flint, in that it produces sparks, but it produces much hotter sparks in greater quantity, and is extremely easy to use. These can be found online, relatively inexpensively, and make an extremely effective back-up fire starting method. No moving parts to break, no fuel to run out of, works equally well wet or dry. Along with your knife, this is one of the most important piece of wilderness survival gear you can carry.
