The system comes with 2 wheels. A 180 grit wheel for working up a burr and a slotted paper wheel to take off the burr and polish the edge. The system comes with some hard wax that you apply to the 180 grit wheel before each sharpening, keeps the heat down on the edge and makes the grit on the wheel last longer. System also comes with a jewelers rouge that you apply to the slotted wheel which acts as a polishing compound. Here is a link to the system:

Razor Sharp Edgemaking

My grinder ranges from aroune 1800 rpm to about 3200 rpm. I have the adjustment knob set in the middle, so I have it running around 2500 rpm. Haven't played with different speeds yet, although the 2500 speed seemed to work very well. <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />