The Chiropractor used the tool on my back on October 27, 2016. I have bulging disk and stenosis. Been to orthopedic, other chiropractors years ago. They would relieve the pain very temporarily, 1 to 2 hours of relief. After having the tool used on my, my pain level is greatly reduced. I can get housework done without the sit down breaks I was used to taking. So pleased with my pain level now.