Very solid crafted part that has proven itself in the few months of use perfectly. That the handles are made of plastic, does not bother me, because that will keep you safe longer. These interventions, however, could turn out a little wider for larger hands! The sisal fibers are woven excellent. Of course, "scratching" it neat, but that's the point: is supposed to promote blood circulation. Perhaps unsuitable for very sensitive skin. My back would be every morning and evening.