Hand selected English Flint, hand knapped from large high quality flint nodules When the steel strike knocks flint stone, the sparks fall into the char cloth and ignites it. Then you can use jute tinder to wrap char cloth and blow it to ignite naked flames Survival flint for outdoor activities can be used as often as you like and acts as an eternal match. Must not be missing in any prepper kit Because our product is individually made by hand, there may be slight production related deviations in terms of shape and surface