Well designed and sturdy, these Australian-made hinges are manufactured from heavy-duty UV-resistant glass-fiber nylon. They are maintenance-free and non-rusting, and have a lifetime warranty. The opening/closing tension can be adjusted with a slot screwdriver. They have two alignment legs for a 3/4" gap, for an easy fit and added strength, and are 5 1/4" (133mm) wide and 3 3/4" (95mm) high. Rated for a 66 lb (30kg) capacity. Sold in pairs with decorative trim covers, instructions and screws included.