Constructed of durable, fiberglass reinforced Nylon and carries a full satisfaction guarantee. The Original Backnobber II tool is a deep muscle, massage device that provides a way for people to manage simple muscular pain and tension both on their own and in conjunction with professional treatment and therapy. The Backnobber II tools natural shape and dimensions allow the user to apply as much pain-releasing pressure for as long as required to achieve its remarkable effects. The Original Backnobber II device is designed to be used comfortably by both large and smaller persons. It is also equipped with a locking mechanism that allows it to be taken apart for convenient storage or travel.