Kai Diamond and Ceramic Retractable Sharpener

No, this sharpener is designed exclusively for straight-edged, double-bevel blades. Using it on serrated, ceramic, or single-bevel knives will damage both the blade and the sharpening mechanism.

The three stages are designed to restore a dull edge systematically. The first stage uses diamond abrasives for rough sharpening, the second refines the edge, and the third uses ceramic stones to polish and finish the blade for a smooth, razor-sharp cut.

The 16-degree angle is fixed to match the specific geometry of many high-quality kitchen knives, particularly Japanese-style cutlery. This ensures you maintain the correct edge angle every time you sharpen, preventing the blade from becoming uneven or dull.

Not at all. The unit features a retractable cover that protects the sharpening stones when not in use, making it compact enough to slide easily into a standard kitchen drawer.

You don't need to use it every time you cook. It is best used as a maintenance tool whenever you notice your knife struggling to slice through ingredients like tomatoes or onions, rather than as a daily sharpening device.