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It doesn\u2019t matter how well a guitar is made or how well the wood has been aged, changes in humidity can cause fret boards to shrink slightly. When this happens the fret ends can slightly protrude.<\/strong><\/p>\n Occasionally, customers ask me what can be done about sharp fret ends.<\/strong><\/p>\n With the use of a fret end file, you can easily smooth out the edges, without even removing the strings. Just loosen the strings slightly and hold the high or low E string slightly back with one hand while smoothing the fret end with the other hand. A fret file, when used properly, will not damage the fret board because the edge that rubs against the fret board is smooth.<\/strong><\/p>\n