For all your woodworking, home culinary, industrial, winter sports, outdoor sports and gardening, get all your knives to their sharpest with this Deluxe Aligner™ Kit. There are three 4" Diamond Whetstone™ in Coarse diamond (45 micron / 325 mesh) included to quickly restore a neglected edge. Also included is a Fine diamond (25 micron / 600 mesh) for a razor sharp edge along with the Extra-Fine diamond (9 micron / 1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond stone. Finally, the fine diamond serrated knife-sharpening accessory will hone serrated edges. Keep everything stored in the provided fabric pouch. No messy oils needed, you can either sharpen dry or with water. Durable construction will provide years of consistent performance and reliable sharpening for the right angle every time.