PSO-Back Muscle Release Tool and Back Massager, deep Tissue Massage Device.. The PSO-Back Muscle Release Tool and Back Massager is a multifunctional device crafted for deep tissue relief of back muscles. Featuring a single massage head with a trigger point function, it delivers a soothing and therapeutic experience. Constructed from lightweight, durable plastic, this manual massager is easy to handle and compact—perfect for use at home, the gym, or on the go.
eBay