Check the listing for details. Smiths DCS4 Diamond Combination Sharpener. Condition: Used. Listed at 17.00 USD. item is like new. one knife has been sharpened with it object shown is a Smith's DCS4 Diamond Combination Knife and Tool Sharpener. This sharpening tool features two sides with different grits for both coarse and fine sharpening. Design: It has a soft-grip rubber handle for comfort and a thumb guard for safety. The handle also acts as a case for the sharpening stones when not in use. The sharpening surfaces are coated with multiple layers of micron-sized monocrystalline diamonds. Grit: The coarse side is 325 grit, and the fine side is 750 grit. Features: The sharpening surface has an overlapping oval hole design to collect metal filings, which speeds up the sharpening process. It also includes a groove for sharpening fish hooks and other pointed tools.