Miyabi Evolution Knives feature mirror polished FC61 Clad Stainless Steel that has been ice hardened for extreme durability and edge retention. Thoughtfully crafted for comfort, Evolution handles are ergonomically designed in a western style with a triple riveted POM handle. The spines of these blades are nicely rounded to protect your fingers from chafing during heavy use. The Evolution series measures at a Rockwell Hardness of 61°, meaning they hold an edge well and are responsive to honing which extends the time between sharpenings and the overall life of your knife.