Small and portable: The pocket knife sharpener can be folded and retracted. It can then be adjusted to various lengths and shaped into the shape of a pencil. Perfect for camping, outdoor adventure hunting and fishing. Ideal for sharpening repair knives, serrated blades and scissors, large and small kitchen knives. The semi-circular surface has grooves that can be used to sharpen hooks, needles, etc. to sharpen the edge. Portable Knife Sharpener: Pencil shape, convenient pocket size, all in one Carrying backpack does not take up much space, help in outdoor emergencies. Sturdy material: The diamond sharpener is made of iron-coated corundum, which has excellent wear resistance, corrosion resistance, high temperature resistance, has high strength and impact resistance. The grinding layer is fine and smooth, which can sharpen the knife well and extend the life of the tool. EASY TO HANDLE: The portable pocket sharpener with retractable whetstone is made of waterproof aluminum oxide for a comfortable and ergonomic grip. Sharpening the knife is not tiring and the needles fall off easily.