... x1Ceramic Peeler x1Arcylic knife holder x1Features1, Materials: Using high-tech Zirconia crafted, high-density, high hardness, never wear.2, Hardness (HRA90) is ... health products!4, Excellent performance: because of its extremely high density and bright the knife is not easy to breed ... 're made out of a high-purity zirconium oxide powder that is compressed at very high pressures and heated in a furnace ...