So I have seen these are around a bunch and have no plans on ever getting one but am intrigued as to how/if they work. I feel, in my understanding of hones, a grit is required to remove steel and create the razors edge....is this wrong? How would smooth glass sharpen steel?
Below is a picture of the device I am talking about....
http://img.tapatalk.com/a6cd0dca-e6ec-866c.jpg