DMT® Diamond And Ceramic Color Coded Grit System
Extra-Extra Coarse (XX)
Silver - 120 micron - 120 mesh
Extreme repair of a very damaged edge.
Extra Coarse (X)
Black - 60 micron - 220 mesh
For aggressive removal of metal on damaged tools. Useful on garden tools, axes, lawnmower blades, plane soles, and to flatten water stones.
Blue - 45 micron - 325 mesh
Rapidly hones cutting tools or restores an edge on a tool or blade.
Red - 25 micron - 600 mesh
Ideal for putting a razor sharp edge on a blade that is regularly maintained.
Extra Fine (E)
Green - 9 micron - 1200 mesh
Polishes and refines the edges of fine knives and precision tools after they have been sharpened on coarser grits.
Extra-Extra Fine (EE)
Tan - 3 micron - 8000 mesh
Extra fine polish to an extreme edge.