Massage tool for self-myofascial therapy. A ball has a hole extending along a chord of the ball. The hole is adapted for receiving a rod having a diameter that is slightly smaller than the diameter of the hole, so as to provide sufficient friction to hold the rod in place when inserted into the hole. The ball has an inner core made of a hard thermoplastic polymer, the inner core surrounding the hole, and the inner core is surrounded by an outer layer made from a softer polymer.