Tuning Forks are U shaped, two prong instruments that emit a specific tone when struck, or striking an object with it. The sound is pure, making it useful for tuning (as the name suggests) as well as sound healing purposes. Using tuning forks during a sound healing session aids in total relaxation, allowing the client to hear and feel the vibrations more effectively. This product has 7 forks (in 7 colors representing each Chakra), a mallet, and an activation puck. They also already have a gemstone extender attached.