The physical performance indicators of doors and windows are: wind pressure resistance, air tightness, water tightness, heat preservation, heat insulation, sound insulation, and compression resistance. The effect of hardware accessories on the wind pressure resistance of the first performance of doors and windows determines the success or failure of doors and windows; similarly, air tightness, water tightness, thermal insulation, heat insulation, and sound insulation are all related to the sealing of doors and windows that hardware accessories participate in. Hardware accessories lock points and lock seats are distributed around the entire door and window. When the door and window are locked, the lock point and the lock seat are firmly fastened together, and cooperate with the hinge to generate a strong sealing pressing force to elastically deform the sealing strip, thereby providing sufficient sealing performance for the door and window, making the fan, frame Forming one can greatly improve the performance of doors and windows. Similarly, the mechanical performance indicators of doors and windows (opening and closing force, repeated opening and closing), and other opening and closing requirements are also inseparable from the requirements of hardware accessories.