: 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 provides smooth, quiet door closure and is simple to operate and install. Adjustable spring tension: This heavy-duty gate spring is easy to install. Attach one side of the spring to the gate using the provided screws, fix the other side to the post, adjust the 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 requires no special tools. Simply attach one end to the door and the other to the post using the included hardware, adjust the tension as needed, and lock the position with the locating pin. Suitable for left and right door openings. Wide application: This exterior door closer is ideal for front doors, gates, farm fences, garden fences, and various types of wooden doors. Suitable for residential indoor and outdoor use.