The Henckels TWIN Profection Series knives are a combination of JA Henckels' expertise and the creative design of architect and designer Matteo Thun. As a result, they meet the rigorous demands of professional chefs and have a stunning design. Zwilling Henckels special sharpening process makes these Henckels Profection knives extremely sharp right out of the package. You'll find it easy to cut with these knives from JA Henckels because of their wedge shape that increases stability. They also feature a curved bolster, which better fits the hand and makes them easy to use. These knives have a lifetime guarantee which is the result of the high-quality steel alloy used in their wonderfully sharp blades.