Perfect for therapeutic applications. The meinl sonic energy planetary tuned therapy master tuning fork is manufactured in germany using hans coustos calculations the cosmic octave. Each tuning fork is tuned exactly to the frequency of its respective celestial body in order to achieve a therapeutic effect. The therapy tuning forks are larger and heavier than the standard tuning forks. This allows them to swing longer and to be struck less often during a treatment or in the professional therapy area. The therapy master tuning fork supports the return to our midst providing ultimate harmony of body soul and sprit. These forks are crafted from nickel grade steel to provide exceptional projection and durability and an ergonomic shaped handle for additional comfort.