standard: Product Name: Knife Grinder Product color: black Product material: ABS+stainless steel Weight: approximately 100 grams Size: 21 * 5cm characteristic: Multi functional three in one design, more convenient Comfortable grip, quick sharpening Fast efficiency and safety Note: 1. The dimensions are manually measured and there may be errors. Please understand. 2. Due to shooting angles, lighting, display, and other reasons, color errors may occur. We apologize for any inconvenience caused matters needing attention Please use carefully according to the sharpening tutorial and do not let children touch or play with it. This product is not suitable for ceramic knife, serrated knives, foot trimmers, butcher knives, and notched knives. After sharpening, please use a soft bristle brush to clean the steel chips at the sharpening edge. Do not wipe the sharp steel chips with your fingers. If you need to wash with water, please use a dry cloth to dry the water and let it air dry naturally to prevent rusting of the grinding stone. The white ceramic grinding head turns black after use, which is a normal phenomenon and does not affect the use effect. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.