The Sacred Solfeggio Tuning Forks are a collection of forks in the spiritual regularities called the Secret Solfeggio. Analyzed by Dr. Joseph Puleo making use of the old Pythagorean technique of minimizing the knowledgeable numbers to their single digit integers, the codes exposed a series 6 of electro-magnetic sound regularities that correspond to the 6 missing tones of the old Solfeggio scale. These initial sound regularities were used in Ancient Gregorian Chants. The incantations as well as their unique tones were believed to convey incredible spiritual blessings when sung in harmony throughout spiritual masses. These frequencies can currently be generated with the Sacred Solfeggio Tuning Forks. 174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, 963 Hz High-quality light weight aluminum forks are made in the USA. Each set consists of a velour bag for safe-keeping.