DOUBLE-SIDED SHARPENING STONES -- Combined with coarse and fine grind to meet different needs. Different side you can use to sharpen different kinds of tools. to sharpen knives and tools faster than traditional stones. There is no need for oil or water. SCOPE OF APPLICATION -- Knife sharpener used in Swiss pocket knives, metal knives, scissors, knife sharpeners. outdoor, garden tools, agricultural tools. EXQUISITE DESIGN -- The whetstone adopts a concave-convex design at the end of the handle, prevents the handle from coming apart when using it and avoids 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. Color: Black Size: closed 12.5*3.5*1.6cm, unfolded length is about 23cm Shipping quantity: 1 piece