A convenient 9-piece radius gauge set for adjusting guitar string height. Even difficult string height adjustments that require experience can be easily done with this! A useful item for self-maintenance and tuning ◎ Easy to use! Simply measure the fretboard radius with the gauge and adjust the string height accordingly ♪ Guitars and basses with uneven string heights will become surprisingly easier to play! 【Sizes】 7.25 / 9.5 / 10 / 12 / 14 / 15 / 16 / 17 / 20 inches Please peel off the vinyl on the surface before use. Please be aware that minor scratches that do not affect use may be present before purchasing. ♪ We carefully inspect items before listing and pack them with care when shipping. If there is a problem with the product, please contact us via the transaction comment before leaving a review. ♪ The actual product images are taken with a mobile phone, so the color of the product you receive may differ slightly. ♪ We will deliver in simple packaging.