... ceramic knife:1. Pantent technology “tape casting to produce zirconia ceramicproducts” to produce our ceramic knife blade.2. Light ... get tired after long-time usage.3. Thanks to our patent technology, our knife is flat after firing ... , no need to polish the surface, so the surface looks nice.4 ... Small notch seldom happen. 3",4",5",6",7" high quality zirconia ceramic blade