... the help of punch press, forging machine or other equipments for instances, hot extrusion of watch case, watch flan, handle, ... to work pieces. Detail applications are stated as follows:Quench for various hardware and tools, such as pliers, wrench, hammer, ... ax, screwing tools and shear (orchard shear).Quench for various automobile and motorcycle fittings, such as crankshaft, connection rod ...