- This wooden Luthier tool delivers efficient material removal while preserving the structural integrity of the fretboard during repairs or guitar-building projects. - Ideal for professional guitar enthusiasts and instrument repair technicians working on guitars, basses, pianos, ukuleles, or banjos that require end and crown shaping. - The 3-in-1 crowning file included in this guitar set provides versatile crowning options in a single tool. - Streamline your instrument maintenance with this corrosion-resistant crowning file; regular cleaning with a brush and applying protective oil ensures long-lasting performance for repeated use across multiple fret leveling projects. - Use scenarios: - Re-crowning frets during fret leveling on a guitar or bass to restore smooth playability without compromising the neck or fretboard. - End shaping and crown forming on frets during setup or repair to improve intonation and play feel. - Routine maintenance across multiple instruments (guitars, basses, ukuleles, banjos) to extend tool life and reliability over many projects.