Simply scrape the "sparking insert" to ignite the shavings to temperatures of 5400°F, hot enough to light even the most stubborn campfire! Good for hundreds of fires. Adopted by the U.S. Armed forces for their survival kits Count on it to work, wet or dry, even with damp kindling And all you need to make it work is a knife! STEP 1 Support edge of tool on ground. Scrape narrow side of tool marked "SHAVING EDGE" with knife blade held perpendicular to tool. Amass small pile of magnesium about the size of a quarter next to tinder. (paper. leaves, small twigs, bark, etc.) STEP 2 Support edge of tool on ground within 1" of magnesium shavings at approximately 45° angle. Scrape entire length of side marked "SPARKING INSERT" rapidly with knife held perpendicular to SPARKING INSERT. This action will cause generate sparks, causing the magnesium shavings to ignite, providing a white hot flame. If you don't want to dull your knife, a small hacksaw blade works great!