DOUBLE-SIDED SHARPENING STONES -- Combined with coarse and fine grinding to meet different needs. Different side you can use to sharpen different types of tools. tion of the handle when you use it, and avoid bending your fingers. EASY TO USE -- The knife sharpener uses diamond surfaces to sharpen knives and tools faster than traditional stones. No oil or water is required. SCOPE OF APPLICATION -- Knife sharpener used in Swiss pocket knives, metal knives, scissors, outdoor tools, garden tools, and farm tools. EXQUISITE DESIGN -- The sharpening stone adopts a concave-convex design at the end of the handle, preventing the handle from dislocating during use and avoiding bending fingers. FOLDABLE DESIGN -- The diamond sharpener can be folded like a folding fan, providing excellent protection against damage. Easy to carry for outdoor use.