Remove the cover from your Victorinox sharpener and steady it perpendicularly on a table with the handle side up. Place the sharp edge of the knife's blade on the grindstone at a 15 to 20-degree ...

Typical knife sharpeners are realised in a tabletop, v-groove design. By contrast, the knife sharpener attached to the Ninja knife block appears to function with the help of a stone sharpening wheel.