Color: gray black, gray red Precautions: 1. Solemnly declare that this knife sharpener is not compatible with 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 the sharpener appropriately in daily use. 1. With 4 levels knife sharpener you can sharpen blunt knives. Knife extractor gives you 4 different options. 2 tungsten steel steps compatible with scissors and coarse sharpening, diamond step compatible with fine sharpening, ceramic stone step compatible with precision sharpening. 2. Non-slip rubber base and ergonomic handle give you cooking experience. The bottom of the knife sharpener has non-slip rubber bases that prevent it from slipping during use. You could use the knife sharpener with confidence. 3. You can grasp and use the knife sharpener with the ergonomic handle. Small and practical. This kitchen helper is not like traditional knife shepherds, difficult to use, but can also be operated well with one hand. 4. Our helper is not compatible with sharpening serrated knives or ceramic knives, but compatible with fruit knives, kitchen knives, cleavers, scissors etc. In addition, please do not pull your knives back and forth, but always only in the direction of the arrow.