DMT Diafold Folding Knife Sharpeners feature folding handles that conveniently fold the whole package down to 5 inches. Diafold sharpners are available with a single grit or double sided which make a handy tool even better by offering two different grits on the same diamond sharpener. Serrated Knife Sharpeners feature a conical shape that tapers from 1/4" at the base to 1/16" at the tip. Double sided diafolds are available in coarse and extra coarse, fine and extra fine, or extra fine and extra extra fine to really hone that hair-popping edge. Extra Coarse-220 Mesh, 60 MicronCoarse-325 Mesh, 45 MicronFine-600 Mesh, 25 MicronExtra Fine-1200 Mesh, 9 MicronExtra Extra Fine-8000 Mesh, 3 Micron