The DMT Diafold Diamond Sharpener provides dual purpose with compact convenience. Two 4" x 1" Diamond Whetstone™ sharpeners combine to create a lightweight sharpener that is great for home, camper, tool box, gardening shed and more. Convenient size measures 9 1/2" long when open and 5" when closed. Folding plastic handles protect sharpener when not in use. Sharpens in a fraction of the time required by conventional stones. 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. Made in USA. Fine diamond (25 micron / 600 mesh) for a razor sharp edge. Coarse diamond (45 micron / 325) to quickly restore a neglected edge.