Coarse is blue, 45 micron / 325 meshFAST: Hardest material, most efficient sharpening abrasive; available in unique interrupted surface and continuous surface
Convenient pocket model 4" Diamond Whetstone™ sharpener with protective leather sheath for easy access to a variety of sharpening, honing or filing needs. 4-1/3" x 7/8" x 3/16" and includes a 1" continuous diamond surface. Standard models available: Extra-Coarse, Coarse, Fine and in the machinist model (WM) in Coarse and Fine diamond. Kit includes standard stones in Extra-Coarse, Coarse and Extra-Fine and a Fine stone in the machinist model. 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.