1.Material: Chinese SUS440C (9CR) stainless steel 2.Blade hardness: 56 to 58 HRC with convex edge 3.Surface:fine polish 1).Material: Chinese SUS440C stainless steel or according to the customer's requirements2).Blade hardness: 56 to 58 HRC with convex edge3).Surface: fine polish or according to customer's requirements4).Handle: comfortable, nice and can be used legerity5).Available sizes: 4.5, 5, ...