INN Sinn was established in 1971, when started with plating business. 14 years later, Dacromet coating was licensed by Nippon Dacromet Shamarock (NDS) contacted with us, and no long later, another Japan Ruspert company also contacted with us exclusively for Ruspert coating. In 1990, we started screws manufacturing business, production range from drywall, chipboard selt tapping screws, machine screws to electronic screws. Diameter M3 to M6. The market we have been spread are Japan, Europe, Australia and USA...etc. Besides these product, our goal on the environmental protection is continuous with Japanese support, which is costing but worthy for our future generation. More, we have been qualified by TUV for ISO 9001 and Japan JIS, TS 16949 are also certifying.