Classification of Hardware

Hardware refers to the five metal materials of gold, silver, copper, iron, and tin, and is the mother of industry; The foundation of national defense and the products of hardware materials are usually only divided into two categories: large hardware and small hardware. Big hardware refers to steel plates, steel bars, flat iron, universal angle steel, channel iron, I-shaped iron, and various types of steel materials, while small hardware includes construction hardware, white iron sheet, lock type iron nails, iron wire, steel wire mesh, wire scissors, household hardware, various tools, and so on. According to the nature and use of hardware, it should be divided into eight categories: steel materials, non-ferrous metal materials, mechanical components, transmission equipment, auxiliary tools, work tools, construction hardware, and household hardware.