I am trying to locate suitable manufacturers in China to produce a steel construction product that I have developed. The product is a hidden internal anchoring system designed to attach wooden 4x4 railing posts to outdoor surfaces such as concrete, fiberglass, or wooden decks. It is also used for stair rail posts. I am looking for a proven, reliable, experienced manufacturer that has produced products for the North American market before. The successful company must specialize in working with sheet steel, bending, punching and welding. Also galvanized or powder coat finishing is required.