Diamond abrasives provide the fastest, easiest and most effective way to sharpen an edge, steel or ceramic. The popular misconception is that ceramic knives don’t need sharpening; but in fact they do lose their edges, and are more prone to nicks and dings. All DMT® diamond sharpeners work on ceramics and hardened steels alike, and now the new HC™ surface offers the toughest and longest-lasting diamond surface ever, making it especially suited for the rigors of sharpening ceramic knives.