Break up tight muscle fibers and hard-to-reach parts in your back instead of putting undue pressure on your spine, so you can focus on deeper stretches without worries. Our 12" wheel back stretcher gives gentle pressure massage and specifically targets the area in contact with the muscles at any given point providing a satisfying amount of pressure in general. The body roller wheel puts compression on the muscles surrounding the spine. In doing so, the muscles are stretched and ultimately targeted, which helps in releasing pressure on your back.