I am more theoretician, but I prefer to invest more money to buy than ever additional parts to a product. This hammer drill is but have been extremely cheap (at all hardware stores nachgeschauten 40Euro more expensive) and is of the handling safe and easy. When I have used it a few times, then I write on, but so far elusive. Property me also the Bosch Bohrkoffer added geklauft because in the drill alone, no drills were included. So I'm fully supplied for wood, metal and masonry. Exactly what I'm looking, for relocation, etc. is to soon. Also screws essays were included in the additional selling drill bits case.