The Huku Cork Peanut Double Ball Massager is an excellent massage prop for your shoulders, neck, foot, lower leg, mid and lower back. The Huku Peanut is perfect for massaging down your spine. The middle groove avoids the spine bones to ensure only the muscle is massaged. This muscle roller is best used against the wall for a gentler massage or lay on your back for a more intense sensation. The trigger ball can be used across and long ways on most parts of the body. It's light weight, discrete and can be used under your desk.