RangeRoller� is the perfect solution when you need a massage therapy tool that targets trigger points and knots. This innovative massage therapy tool provides exclusive Trigger Treads� which allow users to experience a deep massage on both inner- and outer-layers of their muscles and tissues, dramatically reducing muscle pain. Massaging with RangeRoller provides both immediate relief as well as long-term healing as it increases the circulation in the body, relieves painful knots, warms the muscles, and can even eliminate scar tissue. Pro 16″ � Some knots and muscle stiffness need a deeper massage. The Pro delivers the user the deepest muscle penetration and the firmest massage available from RangeRoller. Original 19″ � This massage therapy tool is perfect for all over massage. Medium stiffness provides a great all-around massage and the 19� length makes it easy to take with you wherever you need to go. XL 25″ � With ultimate flexibility and a longer size, the RangeRoller XL is perfect for relieving muscle pain in hard to reach muscle groups like the back, glutes, and legs.