Established in TAINAN TAIWAN in 1992, Yen Chang Hardware Hook & Spring Factory is a professional manufacturer and exporter with years of experience. The mainland specializes are processed metal wire and sheet include semi-finished products and finished products. Ex: various types of metal hardware, wire forms, stamping parts, and fasteners. Our services include OEM and ODM, from products design, mockups, prototypes, mould-making and manufacture.