Using a knife sharpener or steel you can sharpen a quality knife easily and effectively at any time since even the best knife will lose its sharpness in the long run. The knife should be pulled down properly on steel made of ceramics or chrome-vanadium steel before and after each use. An alternative to steel is the WMF knife sharpeners. They provide several grades for rough and fine grinding. Knife sharpeners made of ceramics or steel produce an optimal sharpening result if the knives are pulled through straight. The WMF knife sharpeners stand out by their long service life and easy handling.