Sharp knives are safe knives: They require less force when using and dont slip. The ZWILLING SharpBlock with KIS technology from the FOUR STARS series ensures optimal sharpness for knives. The self-sharpening knife block set protects your knives against damage and completely removes the need to sharpen them. The knife blocks secret is found in the slots: Each slot for smooth edged knifes (paring, carving and chef's knives) has two built-in ceramic sharpening stones arranged at the ideal sharpening angle. Each time you remove or replace a knife, its edge is automatically aligned and the knives are kept sharp and ready at all times. The 7-piece knife block set is a visual highlight in any kitchen. The elegant block in stylish black is furnished with a stainless steel cover for excellent resilience.