A DMT single-sided Diafold (FWC). Coarse diamond, 45 micron / 325 mesh. 9 1/2" open, 5" closed. Folding plastic handles enclose the diamond when shut. Use dry or with water. Sharpener made in USA; other components made in China. Specs from DMT's Single Sided Diafold Sharpener, Coarse page.
Fold it shut and it lives in a pocket. One grit, no oil.
Features