Clean, smooth frets will not only make bending & vibrato easier, but prolong your string life. Oxidized, dirty frets cause more string damage than you ƒ ™d think. Music Nomads revolutionary FRINE Fret Polish has micro-fine polishing compounds that safely & quickly remove oxidation, dirt & oil. Restore smoothness & a mirror shine to your frets without the hassle of harsh cleaners & messy steel wool. Look, Sound & Play the Best with FRINE fret polish.