Coarse is blue, 45 micron / 325 meshFAST: Hardest material, most efficient sharpening abrasive; available in unique interrupted surface and continuous surface
For hands-on control, use DMT's Flexi-Sharp® sheets. Flexible steel shim .006" thick, diamond coated on one side. Cut, bend, glue or screw mount to create a custom diamond abrasive tool. Available in Extra-Coarse, Coarse, Fine and Extra-Fine diamond. Offered in two sheet sizes: SO6 is 2"x3" and SO2 is 1"x2". X- Extra -Coarse (Black 60 micron/ 220 mesh); C-Coarse (Blue 45 micron/ 325 mesh); F-Fine (Red 25 micron / 600 mesh); E-Extra-Fine (Green 9 micron / 1200 mesh)
EASY: Light pressure produces a sharp edge with just a few strokes
CLEAN: Use water for lubrication- no oil, smell or mess
VERSATILE: Hones ALL hard materials: carbide, steel, etc
DURABLE: Starts flat, stays flat - provides years of consistent, reliable use
Made in USA See 'Ships Direct from Manufacturer's link for warranty and return details.