Metal product in our daily life and industrial production in the use of auxiliary, accessories manufactured goods. Early use of gold, silver, copper, iron, tin and other metal materials produced. In addition to the use of a variety of metal materials, but also widely used plastic, glass fiber and other non-metallic materials. Metal products in the process of human survival and development played an important role, with the socio-economic development and social division of the refinement of hardware products gradually rich and perfect, more and more varieties. Modern metal products can be divided into three categories according to the purpose: for daily life of daily hardware, as a production and living with auxiliary tools, hand tools, as buildings and structures in the connector, fasteners and ancillary facilities Hardware. Metal materials, metal products generally by forging blank, machining, surface treatment and other processes made. The purpose of surface treatment is to prevent corrosion and aesthetics. Non-metallic materials, metal products, more use of mold forming or pressure molding, with a lightweight and convenient features.