fire striker
piece of carbon steel from which sparks are struck by the sharp edge of flint, chert or similar rock
en-GB/ˈfaɪə ˈstɹaɪkə/
en-US/ˈfaɪɹ ˈstɹaɪkɚ/
piece of carbon steel from which sparks are struck by the sharp edge of flint, chert or similar rock