... and ceramic knives. 3.Diamond and ceramic material guarantee Electric Diamond Knife SharpenerImportant Safeguards 1,Please read all instructions carefully before ... sharpening groove.8,Do not sharpen knives with oil, water and lubricants.9,Do not use this knife sharpener in direct ... there are children near by.11,Disconnect the power when not in use or cleaning. Features and Functions1,Applicable to ...