In this video tutorial, viewers learn how to sharpen a knife. The materials required are: water or oil, stone and the knife. Begin by dipping the blade into the water and start grinding with a rolling movement on the rough side of the stone. If it gets dry, add some water. Grind on both the sides of the stone. Now flip over the stone and grind with a pulling movement on the smooth side. Then finish the sharpening with a leather belt. This video will benefit those viewers who need to learn how to sharpen a knife for hunting, fishing and survival.