1. This product is the latest generation of the fret-top file. It has been optimized in terms of shape, function, material, and user experience 2. It have 3 different crowning grooves and 1 full side with grit that use for fret ends dressing and fret leveling.The small slot works for extra narrow frets, likes ukuleles; Medium slot works for all standard guitars, bass, banjo, etc; Large slot works for big jumbo frets. That means it'll work on most stringed instruments. 3. The new square handle is more suitable for human hand gripping.It fits more and 't slip.It is easier to apply pressure 4. The innovative square file design can be not only used to level the top of frets, but it can also be used to file some fret ends 5. High strength emery electroplating process brings a longer service life, filing, and higher working efficiency Material: carbon steel+wood colour: As shown Package Contents: 1 x Fret File 1 x bag 1 x English Instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.