For maintaining the excellent quality of door and window, the high-grade door and window hardware fittings are largely made out of stainless steel, aluminum alloy, zinc alloy and high-quality engineering plastics on the premise of strength qualified by using precision molds and highly automatic manufacture technologies. But still there are some manufacturers in the market which change materials and configuration arbitrarily for saving cost, but leaving serious potential safety hazards in installation of door and window. Such manufacturers will be eliminated eventually from the modern market focusing on quality.
The quality of door and window should be accomplished by series of complete quality assurance systems which value the systems engineering of each link and attract attention on quality fundamentally. As people pursue higher quality and higher grade door and window, the technology-centric door and window hardware fitting industry will usher in a wider development space.