The polishing pack of abrasives provides finishes from 5 micron to 1 micron. It is comprised of 5 micron Trizact, and 3 and 1 micron Aluminum Oxide Polish Paper. This fine a finish is not always needed for achieving a sharp tool. How sharp a tool should be is determined by the person doing the sharpening. Hard steel tools hold a finer edge than softer steel tools. An 8000 grit water stone provides a 1.2 micron finish. The Lap-Sharp™ polishing pack is designed with a 1 micron polishing disc, to achieve an even finer finish. The Polish Pack abrasives with aluminum discs, includes the three abrasives discussed above and three interchangable aluminum discs.