The Music Nomad MN813 Diamond U-File lets you level single high frets on your guitar without removing all the strings. Music Nomad's innovative U-shaped channel design slides under the strings for precise file placement on the fret. You get a premium diamond-coated file set with three sizes—1.25", 2" and 3"—so you can do spot leveling on acoustic guitars, electric guitars, banjos, mandolins and ukuleles. With the strings on or off, place the U-File across three frets with the high fret in the middle and file in any direction. The low-profile ergonomic handles provide total comfort and control for precision work. This high-quality tool comes with a convenient storage sleeve and hang holes for each file and the sleeve. Made from stainless steel, the U-File's precision construction avoids deformation so you can use it with confidence.