Extend the life and effectiveness of your knives with this manual 3-slot sharpener. Each slot is for varying degrees of dullness: - The Coarse Slot is suitable for very dull or damaged knives. This is usually the first step if you haven't sharpened your knife in a long time. - The Sharpening Slot is a fine-tuning slot that uses a grinding wheel to really sharpen the blade. This can be used after every use. - The Finishing Slot is a ceramic slot that hones and finishes the blade for extra sharpness. This should be used after the sharpening slot. Each manual knife sharpener features a rubberized bottom that helps to keep it in place while you sharpen. The handle grip design lets you hold the sharpener in place in one hand while sharpening your blade with the other. Both left and right-handed individuals can use this sharpener!