Feature: 1. EFFICIENT REMOVAL OF RUST ON STRINGS: The use of fret polishing eraser can quickly remove rust on the surface of the strings and maintain the excellent condition of the strings 2. POLISH THE WIRE AND RESTORE BRIGHTNESS: Guitar fret eraser can polish the fret of the string to restore the original shine and brightness of the string 3. PROFESSIONAL QUALITY: This string polishing tool has professional quality and is suitable for all types of pianos, electronic organs, etc. 4. EASY TO USE: The simple design make the guitar fret polishing eraser very easy to use and does not require additional tools or expertise 5. PROLONG LIFE: Regular use of this string polishing tool can effectively extend the use time of strings and fret, and improve the sound quality and playing experience of the instrument Specification: Item Type: Guitar Fret Eraser Material: Rubber . Package List: 5 x Guitar Fret Eraser 1 x Storage Box