[Tuning Fork Set] The therapeutic tuning fork is machined from aluminum alloy, precisely tuned to within 0.5% of the specified frequency, and produces a clear, long-lasting tone that resonates deeply, promoting relaxation and overall well-being. [128Hz Tuning Fork] (weighted) ideal for tory testing, neurological assessments, and relaxation. Can be used to support bones, joints, muscles, nerves, and circulation. Apply near the ears for calming effects. [136.1Hz Tuning Fork] (weighted) designed for meditation and relaxation. Can be placed near the ears or on joints, muscles, and other areas to help relieve stress. Suitable for use on knees and feet. [528Hz Tuning Fork] Known for its calming effect on the mind and body. Supports energy flow and may help promote balance in the nervous, immune, and circulatory systems. [4096Hz Tuning Fork] High-frequency tuning fork that may help promote mental clarity and focus. Can be used near the ears or in space clearing practices. Color: Silver Material: Aluminum alloy Package Contents: 2 x mallets (color and style may vary) 4 x tuning forks 1 x small wrench Note: Light and display settings may cause slight color variations. Measurement error allowed: +/- 1-3 cm.