You are buying a brand new gentle jaw stretcher kit from the inventor/manufacturer since we have seen others sell new kits on Ebay for much more than the suggested retail price. Use the gentle jaw for 30 seconds every 2 hours for a couple of weeks to stretch your tight jaw muscles. If your pain resolves, then use it for 30 seconds 4 times a day, in the morning, before lunch, before dinner, & before bed. Experience how passive stretching your tight jaw muscles can give you relief from symptoms that often lead to TMJ, clenching, bruxism, trismus, and headaches. Learn why we call it "yoga for the jaw."