Under the developing strategy of "high tech, export oriented and collectivization",Shandong Guoqiang group introduced successively advanced technology,equipment and techniques from America. Germany, Korea, Hongkong and Taiwan,thus a big scale hardware manufacture line from tool design,cold-punch,die-casting,plastic injection, surface treatment and assembly was set up. We deal in all kinds of accessories for UPVC and aluminium window and door, such as: tilt and turn transmission gear; inward-open drive gear, ourward-open drive gear, hinge for PVC and aluminium, handle for PVC and aluminium, roller and so on.