• 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...