Yeah that was a bit deceptive. A typical desktop CNC machine can easily do precisions in the thousands of an inch, or about 25 microns.

If you look at the close up of picture #2, they are nowhere near a 10 micron finish, which you would be able see your reflection in - all those tool marks (not to mention the logo) are an order of magnitude above 10 microns. http://www.gomboc-shop.com/app/urwfilter/catalog/do/action/S...