Our best competitive incude: DRYWALL SCREWS, TEK SCRWES,DECK SCREWS,PARTICLE BOARD SCREWS,and others with the capability of more than 3000 tons per year.especially our hex washer self drilling screws is very good competitive in quality and price ,this items we produce more than 2000tons per years , many customers like this item and give us very high praise and promise,  Our products are according to International standard of-BS, JIS, DIN, ANSI, etc., and the customers requirement is the basis of our work.