Then your knives should have a very slim cutting edge angle. This further refines and polishes the cutting edge roughened by the fine cut. By straightening the cutting edge, high work performance is maintained without fatigue.
This is the final step if you want a sharp knife.
Starting from a sharp knife you use this to hone the knife to razor sharp.
This Steel does not sharpen the knife but hones it to a razor edge.
For the purists.