The 95x18 Stainless Steel metal of these knives is originally sourced from recycling the intake and exhaust valves of cars and trucks as well as the outer ring of wheel barings. The ring is broken and unfolded at a temperature of 1000 C° to create a flat part which will then be meticulously tempered to make a sharp blade. In order to ensure the longevity of the knives, the sharpest part of the blade is dipped in pure drinkable water. A special custom tested and approved in Uzbekistan.