Handheld self-massage roller helps relieve aches, pain and stiffness in muscles and joints so you feel better and recover faster. Use for health, sport and fitness activities. Simply stow and go! GRINDER rykr roll helps improve Range of Motion (ROM) and increases blood flow and oxygen to the muscles so you can stay active and fit. GRINDER rykr roll can alleviate myofascial tenderness and triggerpoint knots, as well as help improve conditions from arthritis and fibromyalgia. Drug-free pain relief at your fingertips. Comfortable to hold and easy to grip. Simply clean with mild soap and warm water because rykr roll is made from quality materials including FDA Approved stainless steel roller balls. Patent protected.