Ⅰ. Product Description: Professional Knife Sharpener Electric Knife Sharpening Tool Sharpens Scissors, Chef's and Kitchen Knives Powerful 50W Motor, Diamond Coating, 4 in 1 Kitchen Sharpener Ⅱ. Usage: EASY TO USE: The professional kitchen sharpener is easy to use. When using it, just insert the dull knife into the sharpening hole and pull it back 2-3 times. I am sure you can make the blade sharper. Our sharpener has a powerful motor, so we recommend sharpening each side of the blade no more than 4 times. Ⅲ. 4 IN 1 SHARPENER: Our sharpener has four cuts, which are: coarse sharpening hole, fine sharpening hole, scissor hole and screwdriver slot. It is suitable for daily maintenance and sharpening of all kitchen utensils. Ⅳ. EASY TO USE: The professional kitchen sharpener is easy to use. When using it, just insert the dull knife into the sharpening hole and pull it back 2-3 times. I am sure you can make the blade sharper. Our sharpener has a powerful motor, so we recommend sharpening each side of the blade no more than 4 times. Ⅴ. 4 IN 1 SHARPENER: Our sharpener has four cuts, which are: coarse sharpening slot, fine sharpening slot, scissors slot and screwdriver slot. It is suitable for daily maintenance and sharpening of all kitchen utensils.