Yes, nut crackers actually work. They are designed to break open the hard outer shell of a nut so that the edible inner part can be eaten. There are many different types and designs of nut crackers, but they all essentially work in the same way. Place the nut in the jaws of the nutcracker and apply pressure until the shell cracks open. Somenut crackers have a lever or handle that you can use to apply more force, while others require you to use your hands or another object to provide leverage. Nut crackers vary in their effectiveness, depending on their design and how well they fit the particular type of nut being cracked. But in general, they can be an effective tool for breaking open nuts so you can enjoy their delicious contents.