Fingerboard Guards and Guitar Fret File Cleaning Tool Set by Creanoso PROTECT FINGERBOARD while sanding, filing or using steel wool to level out your frets. PREVENT SCRATCHING or damaging to guitar or bass fretboard when filing and polishing frets. Easiest and Safest way to Polish and Clean Guitar Frets without aggressive treatment. SAVE TIME since there is no need to tape up the neck. BEST GIFT for guitarists who maintain their guitars. FREE 1 Creanoso Guitar Pick with every purchase.