The Original Jacknobber II is a simple easy to use tool to give you a gentle massage where you need it. Our palm massager offers a deeply penetrating as well as a superficial massage of neck, back and shoulders. The knobs at each of the four points can be used to apply pressure to muscle trigger points. Smaller knobs provide deeper, more intense pressure. Larger knobs provide broader, gentler pressure. Hold firmly in the palm of the hand and use to massage tense, tired or sore muscles of the neck, back, shoulders, arms or legs. Ergonomically placed finger holds at each leg base for optimum comfort and control. The massage should be carried out in circular movements. Massage along side the vertebral body, never directly on the spinal column. You’ll love the Original Jacknobber Massager! Made of hard plastic. Color may vary.