Diamond Machine Tech Fine/Coarse Diamond Double-Sided Tool SharpenerDual purpose with compact convenience, offers (2) 4 In. x 1 In. surfaces in a portable sharpener. Multi use on blades, kitchen knives, specialty and garden tools, and more. 5 In. closed, opens to 9 1 2 In. Folding plastic handles protect sharpener when not in use. Sharpens in a fraction of the time required by conventional stone. Sharpen dry or with water.