1. Material: tungsten steel, aluminum alloy 2. Purpose: sharpening knife 3. Features: tungsten steel sharpening blade, high hardness, wear resistance and corrosion resistance, double-head sharpening, quick sharpening, adapt to a variety of props, finger grip hole design, convenient and labor-saving, lightweight and mini, with chain ring, easy to carry and store 4. Size: about 9x2.5x0.6 cm 5. Weight: about 40 grams
