[] This gua sha massage tool crafted with premium grade stainless steel, excellent chamfering process, polished to a mirror like finish, smooth and easy to clean, foreasy carry. [PRODUCT DESIGN] The hole in the middle of this shape of muscle scraper massage tool is designed according to people's fingers, of the body ergonomic design, providing sensitive support for massage. [SYSTEMIC CARE] Graston tools can be used with body emulsion or massage oil to coat smooth edges on the smooth skin surface, press hard down, and then move down muscles - so-called friction - gentle massage - or along the path of acupuncture meridians, along the skin. On the surface, gently massage about 4-6 inches at a time. [FUNCTION] The coolness of the metal feels soothing against the skin. Soft tissue massage tools are designed to help effectively treat adhesion and scars caused by surgery, injury and overuse of muscles, injury prevention and rapid recovery. [GREAT SERVICE] We believe you will love this product once the product has any problem, you can contact usm, our professional customer service department will make every effort to ensure your satisfaction.