Double-sided design Has 400 coarse grit and 600 fine grit, the coarse surface grit returning a dull edge and the fine surface grit returning a razor sharp edge. . The compact knife sharpener With its foldable handle, it encloses the diamond sharpening stone, protecting it when not in use. Due to the non-slip handling, the folding sharpener is suitable for all types of knives. . Practical No oil is needed to sharpen any type of knife. Wet and dry sharpening is possible without any problems. Thus, years of performance and durability are given. . Use perfect sharpening results in the shortest possible time on tools such as: kitchen knives, cutlery knives, woodworking tools, gardening tools, scythes, machetes, lawn mower, spades, drills and chisels. . Portable Sharpen faster than conventional stones due to micronized monocrystalline diamond surface No oil required, dry sharpening or water. .