Of what use is a serrated knife that is unable to cut? The last time I tried to cut something using my serrated knife, I realized it was dull. Really dull! I had to use a lot of force to cut through the meat. In addition, instead of cutting, it was tearing the food. Due to its distinctive edge shape, I could not sharpen the knife as I do the other regular ones. Did you know that a dull blade is a real safety hazard?