Dual purpose with compact convenience, the Double Sided Diafold sharpener offers two 4" x 1" diamond whetstone surfaces in one lightweight, portable sharpener. Multi-use on edges in need of repair and sharpening: from blades to cutlery, from routers to garden tools. Coarse diamond (45 micron / 325 mesh) quickly restores a neglected edge. Extra-Coarse diamond (60 micron / 220) provides easy removal of material on a damaged edge. Convenient size: 9 1/2" open. 5" 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.