Both wheels are most effective with Koch Sharpening paste. The cutting edge is pressed on to the running wheel that has been dressed with Koch Sharpening paste. The edge is now as sharp as a razor, even a hollow edge of a complicated shape and there is no sharpening burr created in the process. Had there been a burr left from a grinding process, it would have been removed. Absolutely fantastic, the wheels function from speeds of 800 rpm's up to a maximum of 2000 rpm's, although the optimum is about 1400 rpm's.
Every wheel stands up to thousands of sharpening cycles.
No user needs a lot of expert knowledge. Practically anyone can achieve the best cutting edge the first time and every time with little or no practice. No burrs are formed with this system so you don't have to remove them. Tool life is extended because less metal is removed in creating the edge. You can dress moderately damaged edges, scores, etc., using the same wheel.