The PSO-SPINE is perfect for massaging and releasing muscles to the right and left of the spine. Many demands are placed on your spine. It holds up your head, shoulders, and upper body. It gives you support to stand up straight, and gives you the flexibility to bend and twist. When your muscles are tight around your spine, this can squeeze your nerves and cause issues in different parts of your body. The PSO-SPINE is a self-massage tool that can help keep your spinal muscles healthy and your nerves functioning properly to prevent some of the problems that occur from aging, injury, and everyday movement. The 5 peak design of the PSO-SPINE gives you different options to apply pressure on your spinal muscles. The stable structure gives you the freedom to massage any part of your spine that has muscle tension, soreness, and pain. Use at home, at the gym, at the office or at the airport during a long day, a long trip, or any time you feel back discomfort. The smooth, rounded edges design allows you to use the PSO-SPINE on all chairs. CONSULT WITH YOUR DOCTOR BEFORE USING THIS PRODUCT. PSO-SPINE is made in the USA. Patented US Pat. No. D879,989. DIMENSIONS L = 11.5" | W = 4.88" | H = 2.5" | Peak to Peak = 3" WEIGHT Ibs = 0.79 | oz = 12.69