The BackJoy Trigger Point Massager is lightweight, durable and simple to use. Simply hook the tool over your shoulder or around your body and use the 11 therapy knobs to massage and release tight or achy muscles. Relieve pain through direct pressure in your back, neck, shoulders, and anywhere else your body holds tension. The unique multi-purpose handles offer full control when navigating the device over your body. Therapy knobs provide deep trigger point release.