Huisda Hardware Products Co, LTD.was established in 1993, which is a manufacturer specializing in researching and developing high quality hydraulic floor spring，door closer，stainless steel glass door clamp, glass door lock, glass door handles and glass bathroom clamp ets. Construction of a new modern factory put into use in 2006. It has 30000 square meters, and the area of production workshop has more than 20000 square meters The main products is Huisda and LANGN two brands of series products, during ten years of the marketing of the nationwide and worldwide market, it was appreciated by the customers deeply.