4.5" Utility, 5" Slicing, 5.5" Santoku and 7" Chefs Knife features a patented, proprietary ceramic blade that KYOCERA inventors developed over 12+ years for optimal cutting performance while enhancing the durability 2x more than traditional ceramic blades. With an extremely sharp, ultra-long-lasting edge combined with an ergonomic, uniquely designed soft grip handle, this knife will give any cook or chef precise cutting control. A well-balanced, lightweight, truly advanced ceramic kitchen knife that will never rust or react to acidic foods for pure, simple, and healthy meal prep.