2-stage sharpening with compact convenience. 2-diamond Whetstone sharpeners combined to create a lightweight sharpener that is great for home, camper, tool box, gardening shed and more. Coarse diamond (45 mic/325 mesh) to quickly restore a neglected edge, Extra-Coarse diamond (60 mic/220 mesh) when significant removal of material is needed for a damaged edge. Convenient size: 9-1/2 in. open. 5 in. 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.