Ozeri Elite Chef Black Ceramic 3-Piece Knife Set The Elite Chef Black Ceramic Knife Set includes 3 ultra-sharp 100% ceramic knives that are distinguished by convex edges and 36 degree cutting angles, which offer enhanced sharpness over traditional 45 degree ceramic blades. Features 3 convenient sizes (3, 5 and 6 blades) for effortless chopping, mincing, slicing and dicing, coupled to perfectly balanced ergonomic handles. Utilizing Australian sourced zircon sand for the purest ceramic, each blade is close in hardness to diamonds and preserves its razor-sharpness 10 times longer than traditional steel blades. Unlike metal knives, the Ozeri Elite Chef Black Ceramic Knives do not corrode, rust or leach metal ions from long-term exposure to moisture, oils and acids in common foods. Finished with a reflective black veneer, each Ozeri ceramic knife weighs less than half of an equivalent metal knife, thereby reducing fatigue and pain associating with preparing big meals and repetitive cutting.