 trim off, shave off some tinder, essentially from a log or a branch, and then use that to help start a fire, basically. And then there's a striker in there. It's a really handy little deal. They've been selling these things like crazy. In fact, they've been out of stock a lot. So if you see these things in stock, get yourself one on order because they are pretty neat little kits and they're 12 bucks and they're small. But