Originally Posted By: billym
I have had a BSA Hot Spark on my keys for over a year with no protection and no damage.
I think the sheath may not be necessary at all IMO.
It is just one more step (removing it) before you get to fire.


+1

I keep a ferro rod from a Strike Force in my pocket with other junk. I does not cause any problems.

The real danger is getting it wet. Once wet it will corrode and get pitted. If your pocket gets wet you need to protect the ferro rod.
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