I have never seen what exactly they include. I assumed they included all popular calibers and then some as far as brushes are concerned along with rods, brushes, picks, and more. I considered buying a plastic tool box with some plano tackle bins and building my own kit but I thought that I would easily have $50 invested in building a kit with all the brushes and other tools. I would approach having similar money invested with only half the brushes and other stuff. At the same time, the bore snake makes the brush usages fewer and farther between.