The cover rattles. However, you can't open it by usual methods. You have already been deceived. It takes only one move to open. But you will be surprised to know how to open it. It is based on an idea that was considered when developing an item over 10 years ago. At that time, this idea became “in storage” due to some issues. This time, it was realized by adding new device that makes the idea cleverer. Enjoy the “old idea”. The material teak is hard to process. But it’s beautiful, and it was used. The one-point Yosegi was made by Yoshiyuki Ninomiya.