GHS Fast-Fret String Cleaner (2-Pack) Fast-Fret String Cleaner (2-Pack) This 2-pack includes 2 complete Fast Fret cleaners GHS Fast-Fret String Cleaner cleans your musical instrument strings, brightens your sound, and prolongs fingerboard life while letting you play faster than you ever imagined! Convenient applicator and cloth For all stringed instruments This 2-pack includes 2 complete Fast Fret cleaners