Abstract: A hand-held pistol grip jacket holds an electric heater provided with a heat-absorbing core from which a threaded shaft projects outwardly beyond the jacket. One or more disc-like applicator assemblies are each provided with a metal mounting plate having a centrally located complementarily tapped recess for removably mounting the applicator assembly on the threaded shaft. Each applicator assembly comprises a doughnut-shaped permanent magnet anchored to the mounting plate. A smooth surfaced face plate covers the magnet and, with the aid of a finish plate, serves to engage the body of the subject being massaged.