Even high-quality knives need to be sharpened regularly. Sharpening steel requires a certain level of skill, knife sharpeners are a good option for inexperienced users. WMF knife sharpeners are excellent. They have guides that prevent the blade from slipping between two ceramic plates - some models have a gradual adjustment - during precise sharpening, WMF's sturdy knife sharpeners and non-slip coating on the bottom ensure high-level safety. WMF knife sharpeners are available in many different models with various functions to suit different needs. Cromargan stainless steel 18/10 - easy to clean, does not leave a taste, corrosion-resistant.