Swiss knife is a functional and practical model. The arsenal includes such tools: a large blade, a file, scissors, a corkscrew, a small blade, a bottle opener, a can opener, a Phillips screwdriver, a hanging ring. All devices are made of 420 steel. For a knife of this purpose, this choice is optimal. A low carbon content gives the products increased resistance to corrosion, as well as a good level of viscosity. During impacts and falls, chips and cracks do not form on the tools. At the same time, low hardness makes it necessary to sharpen the cutting edge quite often (with a pocket sharpener, musat or stone).