EXOTAC's fire starting tools utilize a proprietary alloy of rare earth metals called ferrocerium. Some of these metals include Iron, Cerium and Magnesium. When a ferrocerium rod is rapidly scraped, the friction created ignites the shavings producing molten globulars of burning metal. It is these long-burning molten globulars of metal that make a ferrocerium fire starter so effective at catching other materials afire.
The fireROD is designed to refill the ferrocerium rod on the EXOTAC fireROD, but can also be used alone. At only 2.4" in length, it can give you an incredibly small and lightweight way to make fire.
To replace an old rod, simply unscrew the rod and screw in the new rod. Ensure the rod is a snug fit into the rod holder. An optional drop of blue or purple loctite will help retain the rod if it becomes loose.