Tech Spring Industry Company was founded in 1987 and is a standard OEM and ODM of high-precision coil and leaf springs and other pressed components. The company serves a growing base of clients in the plastics, stamping, leaf spring and coil spring industries. TSI began by supplying coil springs, wire forming and continuously-stamped boards. In 2005 the company expanded into high-precision plastics production in response to recent growing demand from the 3C industry. At the same time we also added operations in dies and plastic extrusion .