Well, we're not talking football here but a slightly more traditional 'craft' of firelighting from sparks. In the previous post I showed off my first forged knife - well whilst I was there and waiting for stuff to cool I also made a steel flint striker.
The idea behind this is that you strike the edge of the flattened portion (on the right of the image) on a sharp edge of a bit of flint to generate sparks. These sparks are showered into a suitable tinder which then ultimately becomes a fire. There are modern equivelants that produce, more and hotter, sparks but it is still nice to use and make more traditional processes. another homemade bushcraft product!