The Exotac nanoSTRIKER XL Refill Kit is a replacement ferrocerium rod for your nanoSTRIKER XL. When the 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.Features1/4" Ferrocerium rod works when wet Up to 3,000 fire-starting strikes2" in length