Made of high-quality aluminum alloy, CNC-machining, and subjected to good oxidation sandblasting treatments. You will level most of the frets on the neck quickly and evenly. Leveler lets you level your frets under full tension without removing the strings. You can level your frets with the strings ON Used with the strings on or off, the precision-ground-surface works quickly and accurately to get frets level. Applicable for fret, saddle, and fingerboard sanding, great accessory for players and luthiers. Suitable for the fret leveling of electric guitar, acoustic guitar, electric bass, mandolin Colour: black Material:aluminum alloy size: 457 Size: Approx. 457x38x19mm/17.99x1.50x0.75inch Package Contents: 1 * String leveling beam file bar Only the above package content, other products are not included.