THIS SET OF SCIENTIFIC TUNING FORKS INCLUDES: 174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, 963 Hz (Tuning Fork Set), A Mallets, Clean clothes, and Aluminum box. | A SOFT BAG STORAGE AND CLEANING CLOTH: Deliver a storage case and a piece of cleaning cloth to protect the tuning fork. The cloth bag is specially designed to make it very convenient to take the tuning fork. | QUALITY ALUMINUM: High QualitySolfeggio Tuning Fork Set is made of high-quality aluminum alloy material with a clear tone, longer sound, and perfect frequency. Corrosion-resistant, sturdy and durable, and stainless. | MULTIFUNCTIONAL TUNING FORK: Helps to reduce stress. Can relieve joint pain and stiffness. Reduces inflammation, meditation, and relaxation. 528 Hz Tuning Fork: Balance & Harmonize your own energy field Clear and create Sacred Space, Use as a transformational tool for subtle energy work, Trace meridian lines, balance energy centers, draw Reiki symbols, and more! Many creative uses! | LONG RESONANCE: Extended long handle of turned smooth aluminum to facilitating bone conduction tests and more persistent ringing frequency. A wooden-handled mallet with a rubber head provides the perfect striking tool.