Hardware, said of the five gold, silver, copper, iron, tin metal material, hardware is the mother of the industry; the foundation of the defense, hardware materials, usually divided into two major classes of large hardware and hardware. The large hardware steel plate, steel, flat iron, omnipotent angle, groove iron, the word iron and all kinds of steel materials, hardware, compared with architectural hardware, white metal, Locks, nails, wire, steel wire mesh, wire scissors, household hardware , a variety of tools, and so on. The nature and purpose of the Hardware, the material of iron and steel, non-ferrous metal materials, mechanical parts, transmission equipment, auxiliary tools, work tools, construction hardware, household hardware and other eight categories.