No sharpening skills are required with the Nirey KE-500 Sharpener! Knives will be razor sharp in a matter of seconds. Soft touch and speed control system means no water or oil is necessary. Knives will not overheat. Includes debris tray for convenient cleaning. Dual angle guide lets you sharpen knives with THIN edges (Asian style, slicing, carving) or THICK edges (European style, choppers, pocket knives).