The wide edge double ladder is manufactured with the aluminum extruded profile (6063-T5), surface anodic oxidation treatment produced by our company. The manufacture processes include blanking and semi-assembling, and the product and articulation piece made by punched high strength steel plate. The product has a design load of 100kg, light in weight, high strength, and it is also foldable to be stored in reduced size. It is safe and easy to use, suitable for home, office, library etc.