PSO-MINI is the ultimate full body self massage product. It's great for accessing, activating and ultimately releasing hard to reach muscles of the body. Think of it as a 24/7 massage therapist you can take with you anywhere you go. The PSO-MINI is designed to mimic the two fingers or the thumb. This design makes it much easier to press deep into the shoulders, hamstrings, calves, thighs, inner groin, glutes, lower/middle/upper back, rotator cuff, neck and chest. PSO-MINI is made in the USA. Patented US Pat. No. D823,479