The Misono Swedish Steel series features steel from Sandvic, Sweden which is high carbon steel that takes a steep edge and is easy to re-sharpen. The large knives also come with an attractive engraving that make these knives unique. On the smaller knives up to 210mm the knives come with a flower engraving and on the larger knives over 210mm the knives come with a very interesting and beautiful dragon engraving. Please note that these are carbon steel blades and they will oxidize over time. This is normal for this type of steel. They will also rust if left wet so dry them after each use. Some users apply a bit of oil to the knife after drying to keep the knife from rusting.