These were accidentally cut instead of the new ones. Seems a good portion of the last run of strikers were cut using the old files.
It is made from high carbon steel, professionally cut and heat treated right here in Utah. Like all our strikers, it will fit comfortably inside of an Altoids tin fire kit. It can also be included as part of a Fire Necklace. And we have suitable stone for striking sparks if you can't find any in your area.
Our strikers can rust and tarnish. This is why they cast a spark when struck against stone; rust is just a slow form of burning. This is only cosmetic and harmless. They polish up easily with an abrasive sponge or sand paper.