[Widely Applicable to Various Knives]: For sharpening Straight edge knives that can be blunted, or poorly maintained. [ Life for Old Knives]: This knife sharpening tools has a groove system, which has the ability to repair and sharpen dull or knife edges, while refining sharp edges and removing any remaining burrs or rough spots, and finally the ceramic part Polish and grind edges for a pointy finish to extend the life of old knives [Safe & Effortless Sharpening]: The manual knife sharpener no-slip suction base design adds stability during sharpening. Easily sharpen dull old knives smooth and sharp, saving you time and money on repurchasing knives. The removable kitchen sharpener is easy to sharpen and clean up with water [QUICK AND EASY TO USE]: Place the knife sharpeners on a flat place, hold the handle of the sharpener with one hand, put the blunt knife into the handheld knife sharpener vertically, select the appropriate sharpening card slot, and then gently pull the knife in the same direction 3-6 times A sharp knife is safer than a blunt knife in the process of cutting food. This is a tool for cooking lovers to save worry and effort during the cooking process. If you have any doubts or dissatisfaction with the product, please contact us at any time color:Black Material: plastic, metal Package Contents: 1 x Electric Knife Sharpener 1 x Usb charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.