• Ningbo Sedulous teaches you how to choose the right lock


    Foreign countries have very strict standards for hardware locks, so the quality of imported products is relatively high. We can feel the good or bad of our locks. In general, the feeling of heavy lock...

  • Basic knowledge about locks


    The lock is not only a durable product, but also a very professional product. How to select, install and maintain has certain difficulties for end customers; especially for users who have used a certa...

  • Why did you choose Sedulous's products?


    Founded in 1995, Ningbo Tongyi Metal Products Co., Ltd. is a large-scale enterprise integrating product development, design, production, and sales. It specializes in door lock handles, hardware access...