Wiltshire StaySharp Santoku Knife - Black Scabbard Our knives sharpen themselves so you never have to. The patented self-sharpening scabbard hones and sharpens the knife every time it is removed Cut your kitchen prep time in half and make kitchen life easier and enjoyable again Safety lock button ensures knife is held securely in place when not in use Tried and tested for over 40 years. TEN YEAR GUARANTEE