Tianjin Shangyu Precision Metal Co., Ltd is an experienced manufacturer that has been producing cotter pins for over 50 years in China. Their products include pins for railways, automobiles, farming machines, cruises and other machines.

The patented brand name “Wan-Li” is regarded as a famous brand in cotter pins around the world. The factory can produce products in different materials such as carbon steel, stainless steel and copper. The production standards all comply with GB, ISO, ANSI, DIN AND BS regulations. Shangyu Precision Metal has been exporting its products to Europe, America, Africa and Southeast Asia.