Ferrocerium Flint Fire Starter Lighter Magnesium tool Survival kit Flint Diameter: 0.3inch or 0.8cm Flint Length: 3.54inch or 9cm , this is the longest so far. Scraper Length: 2.56inch or 6.5cm Material: Flint (magnesium), Scraper (iron) Weight: 52g or 1.67oz