This set of ultra-fine grain abrasive pads is excellent for polish and grit removal, when you're looking to remove the absolute least amount of material and to put a mirror polish on. I've used these to polish my frets, and you get a very high mirror shine in no time. Obviously with grit sizes like these, you're not going to be able to do any significant removal of material (no fret leveling etc.), but for a finishing tool they are superbly effective and quick. You can also use these to fix sharp fret ends or "fret sprout" that may sometimes happen if you live in a dry climate. Well worth the investment, as I suspect one set of these will last a very long time indeed!