This is a better tab cleaning kit than most. The files are a little shorter than some, but appear to be a bit stiffer, making them better for rounding the bottom of guitar nut grooves. Tip: get at least 3 real files for the thinnest string cuts, then a set of micro files for larger string gauges, and a set of these files to round the bottom to remove the burrs that are preventing the strings from sitting tight. cut and cause noise and string hum, you know, that sitar sound that got you confused on that one string, they solve that problem, they round off the bottom of the string, cut much better than calibrated stew mac files.