This SCANPAN 3 Step Sharpener makes sharpening in 3 easy steps.

The tungsten sharpening plates remove any small burrs and nicks on the blade, creating a smooth overall surface for which to sharpen further.
The diamond sharpener creates a finer edge preparing the surface for the final stage of sharpening.
The ceramic sharpening plates create a razor sharp edge by polishing the blade to a very fine point.

Comprises 3 stages

Stage 1 features tungsten steel to re-align the blade edge to the ultimate 20 degree angle
Stage 2 features diamond steel which hones the blade
Stage 3 features ceramic fingers which polish and maintain the razor sharp blade