High accuracy, this ergonomic handle is easy to hold hz tuning fork set can be easily placed in any instrument for case or pocket due to its small size Non-magnetic, corrosion-resistant aluminum alloy construction for lightweight and durability aluminum alloy with clear tone, longer sound and perfect frequency A hz Tuning fork for medical, hz is the frequency of love that is for ideal for DNA repair, relieving stress pain, improving attention, Manufacturer: Oxxggkao