You want an extremely sharp cutting edge? Then your knives should have a very slim cutting edge angle. However, slim cutting edges tend to fold over easily – long before they become blunt. The polished surface of the sharpening steel restores the cutting edge to its perfect shape and polish. Furthermore, the polished sharpening steel can also be used as a supplement after using a coarser sharpening steel. 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.