: Self-closing door springs are made of high quality carbon steel with a black protective coating to prevent or reduce elemental damage, rust, and wear for added protection. Gate spring closer: This automatic door closing device helps keep your property secure by ensuring the door closes after use. The strong metal spring allows the door to close slowly and quietly, providing reliable and easy operation. Adjustable spring tension: This heavy-duty gate spring is easy to install. Attach one side of the spring closer to the gate using the provided screws, fix the other side to the post, adjust the spring tension with the adjustment pin, and secure the spring in place with the locating pin. Compatible with both left and right opening doors. Easy to install: This heavy-duty door spring installs quickly. Simply attach one end to the door and the other to the post using the included hardware, adjust the tension with the adjustment pin, and secure with the locating pin. Suitable for both left and right swinging doors. Wide application: This exterior door closer is ideal for front doors, gates, farm fences, garden fences, and various wooden doors. Suitable for residential indoor and outdoor use.