: Self-closing door springs are made of high quality carbon steel with a black protective coating to prevent or reduce environmental damage, rust and wear to ensure extra protection.Gate spring closer: This automatic door closing device helps keep your property secure by automatically closing the door after use. The strong metal spring smoothly closes the door without noise, offering 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 swinging doors.Easy to install: This heavy duty door spring is simple to set up. Mount one side to the door using the included screws, attach the other side to the frame or post, adjust tension with the adjustment pin, and lock the position with the locating pin. Suitable for both left and right opening 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.