DMT Aligner™ ADELUXE Easy Edge-Guided Sharpening Kit.For professional sharpening results, regardless of skill, you can depend on DMT Aligner Kits and Accessories. This kit includes 3x 4" Diamond Whetstones: Coarse diamond (45 micron / 325 mesh) quickly restore a neglected edge. Fine diamond (25 micron / 600 mesh) for a razor sharp edge. Extra-Fine diamond (9 micron / 1200 mesh) to polish and refine a razor edge, after sharpening with a coarser diamond stone. Features Includes fabric storage pouch to carry the Aligner components. Includes serrated sharpener attachment. Maintains a consistent angle to ensure precision, shaving sharp edges. It is perfect for repairing chipped or damages blades. Compact, light, durable construction. Unique system provides guided strokes with a 4 inch Diamond whetstone. Made in USA.