This Top Chef sharpener is top of the line. I have tried cheaper versions only to be disappointed. 

Top Chef is the premier company when it comes to sharpeners.  They know their business.

This sharpener is a little more money than those cheap knock offs but well worth it. 

This sharpener has aggressive micro-fluted ceramic rods that will sharpen all straight edged and serrated blades, scissors, shears and many other tools. Comes with instructions on wear and how to place rods for each that is to be sharpened. Also comes either hand guard to prevent any accidents. A great sharpener. You won't be disappointed.