What Andy said!

The hacksaw blade is tops for scraping on a firesteel.

I spray paint my own 2-inch lengths of hacksaw blades with industrial/farm equipment yellow for easy ID in the woods and paracord them to my firesteel/mag block/etc.

Just because I may have 2-3 (probably more)quality fixed blades/folders/multitools at my disposal right this instant doesn't mean that things can't go horribly South in a heartbeat...possibly leaving me with (God forbod) just ONE edged implement to depend on!

That said, the last thing I want to do is to compromise my most important tool (a sharp cutting edge) while trying to light a fire when there are other methods/materials available.