These adjustable chakra tuning forks are made of aluminum alloy, the sound of these weighted forks is clear, the vibrations of the frequency fork are strong and last a long time. 
USAGE - This set of tuning forks can be a great spiritual and emotional  diagnostic tool.  Tuning forks are widely used  for meditation, yoga, sound healing, reiki practice, easing tension and pain, etc.
These therapeutic tuning forks include, 126.22Hz, 136.1Hz, 141.27Hz, 172.06Hz, 194.18Hz, 210.42 Hz, 221.23Hz, 272.2Hz. The chakra forks come with an aluminum case, cleaning cloth, rubber mallet, wrench, convenient pouch, amethyst boot and tuning fork activator.
After each use, please clean the tuning fork with the cleaning cloth and store it in box.