FERROFIRE SA02 Superb Ferro Rod Striker Scraper has serrated scraper on end to make wood tinder or small curls of soft ferrocerium that is made by SED TECHNOLOGY can works as megnesium, so you don't need to buy a special megnesium as attachment.
SA02 is bigger than SA01, more comfortable hanld for big hands, the hole for attaching it to various other parts of your gear or tools.