Provides intense relief to painful, inaccessible trigger points through massage. Apply pressure to sensitive embedded trigger points for relief from muscle pain and discomfort. May be used directly on the skin or over clothing, suitable for use with massage oils. The innovative design features four knobble it balls, two large and two small, for use on different areas of the body. Apply pressure using 2 to 3 of the balls in large circular movements for a light and gentle massage or, alternatively, just 1 or two balls in smaller circles for a more intense massage experience.