These spare flints mean you don't have to throw away those trusty Clippers and Zippos when you pop the flint.
No more half full lighters discarded before their fruits are fully borne. No more Zippos gathering dust in a drawer because you don't want to chuck it because it was a gift. No more trusty Clippers assigned to the scrap heap because they've lost their spark.
Here be spare flints and thus the secret to everlasting life for your lighter.