1.sand or mirror finish ceramic knife; 2.hi-tech immersed,hard,sharp and durable 3.new ... product,we have the patent of it. Specifications 4-PCS Ceramic knife set1pc 6.5"1pc 6"1pc 5"1pc 3" Safty ... edge.2.Wearability is 60 times as much as metal knife ,wear-resistance.3.Anti-corresion,never rust ,keep food orginal ...