1. Solemnly declare that this knife sharpener is not suitable for serrated knives. 2. Do not use too much force when sharpening the knife and do not grind back and forth to avoid damaging the blade. 3. The ceramic rod and the metal blade in the sharpener can be contaminated, which is normal. 4. Do not put the sharpener in the dishwasher or in water, but keep it dry and clean 5. Please be careful and use our sharpener appropriately in daily use quantity of delivery:1 piece (Package contents: Only the above package contents, excluding other products.) size:22.5*4.3*7.8cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color:black colors (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.) Products from LUOLV's store