Double-sided design Has a coarse 400 grit and a fine 600 grit, the coarse surface grit restoring a dull edge and the fine surface grit bringing back a razor-sharp edge. The compact knife sharpener With its foldable handle, it encloses the diamond whetstone, protecting it when not in use. Due to the non-slip handling, the folding sharpener is suitable for all types of knives. Convenient No oil is required to sharpen any type of knife. Both dry and wet sharpening are 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, lawnmower knives, spades, drill bits and scissors. Portable Faster sharpening than conventional stones thanks to the micronized monocrystalline diamond surface. No oil required, dry or wet sharpening.