... -corrosion, enviroment-friendly Good hardness ,wearability wear-resistance Ceramic knivesProducts details:Type:3pcs ceramic knife setIncluding:1pc 3" paring knife+1pc 4 ... :ABS + TPRAdvantages:*Blade made from advanced nano-grade zirconia ( ZrO2),high-tech product*Hardness is HRC90, only secondly to the diamond ... products,pls feel free to contact us for more information. High quality Ceramic knives