NANJING TOUTRU TRADING CO., LTD. and SUZHOU CHENGLI METAL PRODUCTS CO., LTD and ZHANGJIAGANG CITY CHANGJIANG METALS AND LOCK. CO., LTD. are belong to SUNAN LOCK GROUP Corp., LTD. We are specialized in producing and exporting all kinds of door locks, drawer locks and general hardware. Our range of products: 1. Mortise and rim locks for wooden and metal door. 2. Electronic locks. 3. Standard and high-security cylinders. 4. Drawer locks and furniture locks. 5. General hardware. 6. Door handle. Now our group has over 700 employees. The annual output is more than 20 million US dollar. All of our products are for export.