For professional sharpening results, regardless of skill, depend on DMT Aligner Kits and Accessories. Aligner Pro Kit of 3 in. to 4 in. st1s 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. Coarse diamond (45 micron/325 mesh) to quickly restore a neglected edge, Fine diamond (25 micron/600 mesh) for a razor sharp edge, and Extra-Fine diamond (9 micron/1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond st1. Easy-to-follow instructions included. Sharpening with diamonds is fast and easy. No messy oils needed sharpen dry or with water. Durable construction will provide years of consistent performance and reliable service. for proper tool maintenance, woodworkers, chefs and other professionals rely on the superior quality and versatility of DMT products.