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. Extra Extra-Fine Diamond (3 mic/8000 mesh) provides the finest polished edge of all bonded diamond abrasives. Extra-Fine diamond (9 mic/1200 mesh) to polish and refine a razor edge after sharpening with a coarser diamond. 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.