Great for serrated knives of al kinds09/10/2015 ByDAn I used this to sharpen up a beater serrated bread knife. It used to crush the bread, now it slices right through, like the day my wife first brought it home. I works great on my big Spyderco Endura. It's a very versatile tool. If it had diamond, rather than ceramic it would have earned 5 stars, but the ceramic cuts fine.