Did you know that you can use a diamond stone to sharpen up your knives? Straight edge blades have a tendency to get dull unlike serrated knives. Diamond stones are better than the typical sharpeners because they can put a nice even edge on your blade and not leave burrs. After your knife is sharpened you can test it out on a piece of paper to see how well it is cut. Knives do need to be sharpened because the duller the knife the more likely you are to cut yourself.