Ceramic Sharpener: 1.High hardness 2.Durable, Easy to Use 3.ISO9001,FDA/ SGS Approved 4.Market: USA, Europe, Asia 1, About JOHNCERA Ceramic SharpenerThe main part of Ceramic sharpener is made of alumina ceramic with high hardness, wear resistance, It doesn’t only save the sharpening time, but also saves the life span of the knife. We believe it will make your living healthy and convenient.Rod ...