The Black Roll is a very good Faszienbehandlung for the entire body. I can also well used in hand therapy. Although the book is very descriptive, but it provides little stimulation examples. Even testing experiences are in great demand. In hand-arm-shoulder area I test currently several training possibilities. For me personally, the hardness of the roll is very good, but my clientele needed something softer material. The Big U .: small role I good use for foot exercises. An intermediate size would be very helpful. For stretching exercises, it is also well suited for use. One can with it just once a slight pain point just roll away. I can only recommend Greeting R.Labuske from Berlin