This is a hand-held container for crushing walnuts. All you need to do is put the walnut in, close the lid and then beat it down with the upper lid, the walnut will be broken, and the pointer below will suddenly bounce to the maximum scale, so that you can "see" with your own eyes how strong your beating is. The purpose is to reshape the complicated walnut shell breaking process into a life fragment full of control and decompression ceremony.