The heart chakra tuning fork is a powerful tool for balancing and harmonizing the energy of the heart chakra. Crafted with precision, this tuning fork produces a specific frequency that resonates with the heart chakra, helping to clear any blockages and restore its natural flow. By gently striking the fork and placing it near the heart area, you can experience a deep sense of calmness and emotional healing. 7" mallet and stamped 136.10 Hz. The base of this tone is the rotation of the earth around the sun.