Metal products are indispensable products in modern industry and life. How to distinguish their quality is the problem we need to pay attention to when we buy and use them. This paper will discuss the quality discrimination method of metal products from the aspects of metal material quality, production process, surface treatment, structure design, function and so on.

Window and door hardware refers to the metal parts used for Windows and doors, including locks, handles, hinges, door hinges, etc. As one of the important accessories in home decoration and construction industry, the quality control of window and door hardware accessories is particularly important.

With people's higher and higher requirements for interior space design, the choice of window hardware accessories becomes more and more important. It should not only be coordinated with the interior decoration style, but also meet the needs of modern people for safety, convenience, environmental protection and other aspects. So what problems should we pay attention to when choosing window and door hardware accessories?

Window and door hardware accessories are composed of hardware parts from small to large. They are used in window and door and other home decoration building materials products. They are an indispensable part of window and door design. Because of its importance, let's discuss the advantages of window hardware accessories.