http://www.gatesplus.com.au KwikFit is a Fixed tension self closing hinge, and is designed to carry gates weighing up to 20kg, handling light to medium size gates around the home, this hinge is a residential class hinge. Made from Molded polymer and with a stainless steel torsion spring, No sagging, no rusting and free from staining, it offers a smooth, reliable closing action, Alignment legs provide a very good fit to most post. Use 12-gauge fasteners to secure the hinge.