Description:1. Material: The locking hinge is made of zinc alloy, which is thick and durable, not easy to rust, not easy to age, easy to clean, and can be used for a long time.2. Design: The upper and lower flap doors have an adjustable locking hinge torque that can be tightened to the end locking hinge 180 degrees. When opened to a certain angle, the locking hinge will automatically lock and remain in that position without accidentally closing or moving, providing safer and more stable support.3. Easy To Use: Operation is simple, position the hinge and securely fasten it with the mounting screws. They allow items to be fully opened and kept open when needed, while also allowing for effective control of closing speed to avoid pinching hands or damaging items.4.