[Widely Applicable to Various Knives]: compatible withsharpening Straight edge knives that can be blunted, or poorly maintained. [ Life compatible withOld 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 compatible witha pointy 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 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 in the same direction 3-6 times A sharp knife is than knife in the process of cutting food. This is a tool compatible withcooking lovers to save worry and effort during the cooking process. If you have any doubts or dissatisfaction with the product, 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.