1Wide Range of Applications: Self closing gate spring is very suitable for automatic closing gates, doors, fences and much more in outdoor, villa, etc. 2Adjustable Spring Tension: Self closing gate spring is professionally designed for adjustable spring tension for heavy and light duty jobs. 3Durable Material: Self closing gate door spring is made of carbon steel with an electrophoretic black finish for extra rust protection and durability. 4Multiple Function: The automatic gate spring is engineered to close automatically, the closing tension is adjustable, and it is suitable for left door or right door. 5Complete Kit: Heavy duty adjustable tension gate spring handware kit consists of spring, screw, locking pin and adjuster tool for easy and convenient installation.