Production process tracking card with 4 colors means different property class raw materials .Steel batch # . Mfg. Lot# . Heat# were included on it for future quality claim tracking . each lot kept at least 5pcs in our stock for 3 years .
Still insist to choose the bigger steel fatory with steady quality raw material .Refused bad quality with lower prices from small steel factory .
Precision and steady 4 stations forming facilities that some parts from Germany . Japan . France . Taiwan etc .
Imported from taiwan tooling manufacturer that can make sure steady and qualified quality .
Machinery opertor all had more than 15 years screw production experience .