The 128 Tuner is especially effective when placed on the rib heads, thoracic vertebra, sternum, and illiums. Tuners tapped gently on the knees and held to the ears create a beautiful sustained low tone, which is excellent for grounding and relaxation. For listening, hold the 128 Tuner by the stem and gently tap the weights on your knees or tapping pad. Bring the tuning fork(s) to your ears and adjust the distance by tone. Hold one fork about an inch from your left ear and one an inch from to the right ear. This creates a long sustained pitch. Tuners are available in three Different Frequencies: 32, 64, and 128 Hz. It is recommended to start with the 128. These tuning forks are made of aluminium alloy, great for harmonics and sound healing. Because of this softness, you might find the occasional small mark or scratch. The fork isnt damaged, nor is the tuning off. It can happen during packing by the manufacturer, or during shipping and handling. We provide safe storage and great care when handling them. Material: Wood + aluminium alloy colour: Blue + wood Package Contents: 1 x Tuning Fork 1 x Tuning Fork Hammers(randomly colored and Styles. Cannot be chosen the specific color and Styles) 1 x small wrench(randomly colored and Styles. Cannot be chosen the specific color and Styles) 1 x cleaning cloth(randomly colored and Styles. Cannot be chosen the specific color and Styles) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.