Guitar Fret Rocker + Fret File + grinding stone + fingerboard repair tool kit Description: Function: The guitar threshold file is used to polish and repair the guitar neck. Grinding stone can grind and polish metal things. Grinding Stone (Red): Professional tools for grinding and polishing saddle, nut and frets. The easiest and safest way to polish guitar frets without aggressive treatment. Fingerboard protectors can protect your guitar, bass fingerboard from scratches, damage when folding, polishing. This rocker stainless steel frets can help you work more accurately with frets for better playability, e.g. indicating unbearably high thresholds, checking the final height. Stainless steel threshold file with rubber handle for convenient application to narrow threshold finial when aligned. Package includes: 2x grinding stone (red, green), 2x fingerboard protector, 2x Polish paper, 1xFret Rocker, 1xFret File. Applications: An essential tool for luthiers, guitarists, lovers, DIYers, DIYers and guitar violinists, ukelele and bass. Specification: Material: stainless steel, rubber, stone Size Chart: Fret Rocker (DxSxGrub): approx. 10,5x5,1x0,2 cm/4,13x2x0,08 inch Threshold file (L. x width ): approx. 185x19x3mm/7.28x0.75x0.12 in. The package includes: 2 pieces grinding stone (red, green) 2 pieces fingerboard protector 2-piece Polish paper 1-piece threshold rocker 1 piece threshold file 1 piece storage bag