CHENGXIN INTERNATIONAL (HK) LIMITEDÂ specializes in exporting non-standardscrews, CNC parts, stamping parts, and related hardware fittings.Our factory Tung Shing Screw Manufacturing Co. was established in1993 in Shenzhen, Guangdong Province. We are proud to have obtainedISO9001-2008 management systems certification in 2009 and continueto develop our Operations in order to produce quality products forour customers. We supply to a wide range of Large Corporations aswell as SMEs in America, Europe, Australia and China. Our productsare used in eye glasses, clocks/watches, cameras, mobile phones,domestic electrical appliances, toys, decorative lighting,furniture, kitchen and many other householdproduct