[Self Closing Gate Hinges] self-closing gate hinge has a self-locking function. You can adjust the spring tension according to the needs of the door using the adjusting tool (spring tension determines the closing speed of the door). So as to achieve self-locking function, providing real security for pets and babies. [Strong and ] The self-closing gate hinge not only features rounded corners to prevent accidental injuries, but also its right-angle installation and multi-hole screw design ensures a tight fit between the hinge and the gate, significantly improving the stability. In addition, the welded connection of the gate hinges ensures excellent load-bearing capacity, allowing the gates to operate safely for many years. [ Hardware] Self-closing hinges are heavy-duty products with a coating finish, providing excellent rust and resistance and allowing for long-term outdoor use in harsh weather conditions. The materials used in the door hinges a high level of safety and reliability, making them suitable for use in wooden fence gates, metal gates, vinyl gates, and PVC gates, among others. [Adjustable Distance] Automatic gate hinges can be adjusted as needed from 1/4 inch to 1-1/2 inch (0.58 cm to 3.81 cm), the maximum Angle of the gate opening and closing is 90 degrees. And the hinges are parallel to each other to avoid the door tilting or sagging. Color: Black Material: Iron Package Contents: 2 set x Gate Hinges 1 set x screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.