*PREMIUM for PROTECTION: This self closing gate hinges is suitable for inward and outward swinging wood or metal doors.The gate hinges prevents predators from entering homes with open doors, and at the same time prevents pets from opening the door and sneaking out. *STURDY AND : self closing gate hinges is painted in black, anti-rust, and with excellent resistance. This heavy duty hardware hinges can last for outdoors. With the of safety and reliability, widely used on wooden fence , metal , vinyl gate, PVC . *SELF CLOSING ADJUISTABLE: Using the swing adjustment tool, put the stopper (small rod) into a series of small holes around the top of the gate hinges for wooden fences heavy duty, and adjust the tension of the spring hinge to reach the desired level of tightness. You can adjust the distance between gate and flanges by a nut screwing., Manufacturer: Aundhegrtt