UNDERSTRING FLK mini
UNDERSTRING FLK mini is a system designed for spot leveling the frets, or the fretboard, under strings tension. Fret leveling with the strings on and tuned to pitch with the correct neck relief allows to level the frets with best accuracy while removing the minimum amount of fret material. With FRETRAIL mini you can level the frets on your bench or using it with the instrument placed in playing position. The system includes a special string raiser that helps to unlock the movement of the tool without altering the balance of the instrument. It comes preloaded with #320 grit abrasive plus a recharge roll. T-shaped understring fret levelers and V-shaped fret files are RECTIFY Master concepts and designs.