What is hardware? It is a general term which refers to metal tools used in the building and furniture. There are a lot of hardware products. They can be grouped into big hardware and small hardware. The former refers to steel materials, such as steel plate, steel bar, channel iron, flat iron. The later often refers to the following items, such as construction hardware, tin plate, iron wire, household hardware, and tools. According to its property and function, the hardware also can be grouped into eight classifications, namely steel material, non-iron metal material, mechanical parts, transmission equipment, auxiliary tool, work tool, construction hardware and household hardware. Owing to the limited space and time, the article will mainly introduce the small hardware. It has a lot of varieties and specifications. It plays a very important role in the room decoration. Only through choosing the good hardware components can people use the decorating material safely and conveniently. At p...