This set of frequency tuning forks performs well and has high frequency accuracy. The tuning forks have a long resonance time and can be used for bone conduction testing and general instrument tuning. The Solfeggio tuning fork set comes with 10 high-quality tuning forks, 10 rubber bases, 2 rubber hammers, 1 cleaning cloth and a beautiful aluminum box. The frequencies of the tuning forks are 174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, 963 Hz, 432 Hz. They can help us enter a deep state of relaxation, increase our mental clarity, and relieve stress, and they can be used for guided meditation and many other types of deep energy work, such as Reiki practice, yoga, cleansing. It is also great for DNA repair, balancing energy centers.