4. Adjustment Sometimes, the alignment of the rollers may need adjustment. If a window is difficult to open or closes unevenly, consult a professional to make the necessary adjustments.
As the movable part of windows and doors, hardware accessories must guarantee the performance and quality to ensure the safety of windows during long-term using time. Windows and doors handle need to conform to ergonomic design, high transmission performance, wear resistance and corrosion resistance; hinges require high hardness, strong toughness and not easy to deform; locks require smooth opening and closing and tightly engaged.
Frame: The main body of the window, which provides structural support and houses the panes of glass.