I EDC a hotspark on my aloz farmer lanyard. The back of the alox farmer saw blade works great. I actually use it with the saw in the closed position. No sense accidentally cutting myself. I haven't had to rely on this yet.

When going outdoors, I carry the larger Swedish firesteel in my pocket attached to a clip that is attached to my belt. The back of a Fallkniven F1 throws huge sparks.