For professional sharpening results, regardless of skill, depend on DMT Aligner Kits and Accessories. Aligner Pro Kit of 3 4-in. stones in coarse, fine and extra-fine diamond grits; a fine diamond serrated sharpening accessory and 7-Angle adjustable and non-marring blade guide that also accommodates a greater range of blade spine widths that are all neatly stored in a compact, rugged carry case.