... Features1, Materials: Using high-tech Zirconia crafted, high-density, high hardness, never wear.2, Hardness (HRA90 ... products!4, Excellent performance: because of its extremely high density and bright the knife is not ... the next food item.4, Sanitary: The density of Ceramic blades is very high, and the ... Lightweight: Ceramic material is very light weight. Density of steel is 7.85g/cm3, Ceramic Knife's ...