A spring-loaded hinge that will enable any single gate or double gate to automatically close. Required for swimming pool gates in most US jurisdictions. Highly adjustable, Made from super-strong engineered polymer. Won’t rust, bind, sag or stain. Internal stainless steel spring and components. Self Closing Hinges are packaged separately and not attached to the gate when shipped. This allows you to decide, on-site, which gate post to install the hinges on and which trajectory the gate will swing.