Wusthof Two Stage Knife SharpenerSafe and easy to use, this Wsthof 2 Stage Knife Sharpener (4347) requires nothing but a few easy strokes to keep blades sharp. Can be used for serrated and scalloped edges (ceramic fine stage only). Soft Grip Handle. 2 Stage Knife Sharpening Note: The first stage carbide (coarse) sharpens dull edges. The second stage ceramic (fine) provides a polished, razor sharp edge. A reasonably sharp knife may only require this light honing. Care & Use: Always