The Sacred Solfeggio Tuning Forks are a set of forks in the sacred frequencies known as the Secret Solfeggio. Deciphered by Dr. Joseph Puleo using the ancient Pythagorean method of reducing the verse numbers to their single digit integers, the codes revealed a series 6 of electro-magnetic sound frequencies that correspond to the 6 missing tones of the ancient Solfeggio scale. These original sound frequencies were used in Ancient Gregorian Chants. The chants and their special tones were believed to impart tremendous spiritual blessings when sung in harmony during religious masses. These frequencies can now be produced 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 aluminium forks are made in the USA. Each set includes a velvet pouch for safe-keeping.