Item Details - Tuning Fork (A440)

• Tuned to A above middle C (A440)
• 4.5mm diameter prongs give a pure and clean tone
• Supplied with soft plastic case
• Electronic tuners are easy to use, but this is the best way to develop your ear while tuning
• Suitable for use with any tunable instrument. Most commonly used with stringed instruments.

Hit the fork on a hard object to make it resonate at 440Hz and then hold the bottom on a wooden surface (like your instrument) to amplify it. Then simply tune your A string to the tone of the fork and then the rest of your strings to your A string.