Fire steels oxidise very quickly.This is even more so in a marine environment.Fire steels contain ferrous metal and will break down in moist climates.Imagine swamps,jungles,rain forrests and the like.I was on a beach operation once and a DOANS magnesium block had its stricker rot out in less than two weeks.I like the concept of the Nano Striker but think it is too small.The small parts may be hard to handle with cold and numb fingers.I also do not like that it screws together as the threading could seize up.If it just pushed in like the cap on a K&M Matchsafe then it would be ideal...

BOATMAN
John