Curved Ruby Ceramic Sharpening Stones are used for sharpening inwardly curved blades on Hapstone and Edge Pro knife sharpeners. The stone has an extremely high hardness rating. The working surface is curved. Curved diamonds are designed to sharpen kukris, karambits, hawkbills, scythes and any type of recurved blades.
Ruby Ceramic stones can be used without lubricants. Alternatively, oil or WD-40 can be used as lubricant.
Ruby Ceramic stones do not have any minor defects.
Ruby Ceramic stones do not require any preparations.
If you have a question regarding this product, please feel free to ask.