Aurora Fire Starter™ is rugged, and is designed for survival. The Aurora Fire Starter™ uses a large 1/4" diameter (.635cm) composite flint steel rod that has magnesium built into it. The built-in Striking Blade could be a lifesaver! You can wear the lightweight Aurora Fire Starter™ on your key ring or around your neck on a lanyard and if you are ever separated from your pack or knife you will still have everything you need to start a fire.