The Four Star collection is perfect for chopping leafy greens, slicing delicate fruits, julienning carrots and so much more. Zwilling put over 287 years of cutlery experience into designing this cutting-edge collection, from the Sigmaforged process that forges each blade to the virtually unbreakable, colorfast polypropylene handles. The self-sharpening block features built-in honing mechanisms that automatically sharpen the edges to the perfect angle every time a knife is removed or replaced.