Founded in 2007, Hangzhou Lizhan Hardware Co., Ltd. /haiyan Power Fastener Co., Ltd. just offer fastener only, we have full experience for the fastener system, when you place the order to LIZHAN, we will arrange one person serive this order, from produce, hardness, plated, QC, and packing then load to container, all of the process will be followed, if you want, you can get the photos from our company about your goods. 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.