It is very useful. I have always had pain in my back and cervical spine. I used this rolling rod to push my back and pushed out a lot of sha. The quality is good, the sha comes out quickly, the pain is light, it dredges the meridians, and expels dampness and coldness. It is really a whole body. I feel very comfortable after using it! Great, 🍱 Overall, this is a very satisfactory shopping experience. I will come again if I need it in the future.