For meeting sever request of Low Defective Rate, we install sorting machines in our factory including roller-, laser-, and optical-sorters to sort out scrap and unqualified products. In our Q&A office, engineers strictly inspect samples pick up from every lot of semi-and finished-product by variety of testing machines. We are certificated screws manufacturer of ISO9001-2000 version awarded by SGS, and TS16949 awarded by BSI.