That depends on many factors such as your local rent price and the market price of security doors. The big-name security door has a high threshold for joining, but its popularity is high. Small and medium-sized brands of security doors, although slightly less well-known, believe that the service will be very good and will not self-destruct the signboard. Where are you from in Shandong? You can look at our company, Luoyang Yizhaofu Door Industry. Welcome to visit our factory. Interested parties can call 400 0369 600 for consultation.