Tianjin Chaotuo Imp. & Exp. Co., Ltd. is a leading manufacturer of various Screws located in Tianjin city China. The factory was established in 2008 and now it becomes one of the biggest manufacturer with a 20,000 square meter area and more than 60 workers working in the factory. Tianjin Chaotuo Imp.&Emp. Co;Ltd is a specialized in Screw factory. we have more than 100 sets of machines for screws from Taiwan . We have the Drywall Screw ,self drilling screw , self tapping screws, ...