MusicNomad Guitar Tech Fret Tool Set (MN880), extensive, premium fret tool set for working on instrument frets, inkludes fret tools for diagnose, spot level, crown and polish frets, plus fix guitar fret sprout and sharp fret ends, Fret Rocker+ (MN822) precise measuring tool for checking fret height, string action and pickup height, Fret Gauge (MN840) feeler gauge set for diagnosing fret problems, Fret Leveler U-File Set (MN813) precision tool for dressing individual frets, Tracers Fret Finishing Kit (MN860) 6-piece polishing set for instrument frets, Fret Crowning S-File (MN850) precision file for fret crowning, Fret Beveling B-File (MN831) precision tool for filing and bevelling of fret ends, Fret End Dressing E-File (MN830) precision file for processing fret ends, Fretboard Grip Guards Set (MN225) 3 contoured premium fretboard guards (1 each for small, medium and jumbo frets), File Cleaning Brush, incl. organizational storage case, Note: The fret files are not suitable for working on stainless steel frets. The extreme hardness of the material can damage the diamond coating of the files. Please note that this is not a valid reason for exchange or complaint if the file becomes defective after use on stainless steel frets