This Farberware 5 In. Santoku Knife with Edgekeeper Sheath is an ideal way to have a sharp cutting tool at hand at all times. The unique design of the Edgekeeper sheath has a built-in knife sharpener that creates a sharp blade every time the knife is inserted or removed. The sheath also keeps the knife protected while in storage. Hand-wash with warm water and a mild detergent; rinse and dry immediately.