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How to use the knife sharpener: Place the knife vertically into the sharpening groove and pull in one direction. Do not push or pull back and forth to avoid damaging the blade. Universal compatibility, suitable for all blades: sharpening kitchen knives, folding knives, and scissors. Ergonomic and non-slip handle: The non-slip rubber base and ergonomic handle ensure a safe grip, even with wet hands. Compact and portable design: Lightweight and portable, perfect for camping, the kitchen, or touch-ups on the go—it fits in any drawer or backpack. Easy to use: The intuitive pull mechanism perfectly guides the blade—avoiding the uneven edges common in traditional sharpening stones.