I carry this with me everywhere. As long as you have a piece of metal to scratch against it, you will never be with out fire. Here are some steps that will help you get the fire started as soon as possible and safely.
It’s best to use the backside of the knife to scrape the magnesium block in order to protect the edge. Using the ground as support scrape a small pile of the magnesium shavings. Practice this technique so when the times comes you know how to do it perfectly. If the wind is blowing you would want to protect the shavings. Either put objects around such as wood logs or create an indentation in the ground by digging.
Another useful hint, is to use a dry leaf to contain the shaving as you are trying to spark. Be careful not to scrape too hard and hit the leaf. A piece of duct tape can be used to keep the wind from blowing the shavings away. Place pieces of tinder around the shavings.
There are several techniques you can use to scrape the flint rod on the block.
One method is by holding the knife stationary against the ground and pull the block carefully across the edge of the blade.
Another method is to scrape the blade down the flint rod. Note: Try not to hack at the rod. Not only is this dangerous but it will damage the flint rod. It’s also not good for your knife.
Scrape the blade down the rod side to get a spark. Some knives will allow the use the back edge of the knife (the spine) in order to protect the blade edge. (some people file down the knife spine to add groves or expose the metal). Now reverse the magnesium block to the flint rod side. Then pull the rod across the knife edge in a smooth motion. This will create a spark. If you create the shaving and spark without moving the knife, it should easily ignite the tinder. Great now you have fire! You can get one here!