Craftsman's lifetime warranty is legendarily liberal—if you find a broken socket wrench from 1930 at the dump, you can take that right in and exchange it for whatever the contemporary model is. Of course, that means that you should buy up every $2 piece of junk at a yard sale if it has Craftsman written on the side and hit up the nearest Sears.
The full text of its policy:
If for any reason your Craftsman hand tool ever fails to provide complete satisfaction, return it to any Sears store or other Craftsman outlet in the United States for free repair or replacement. This warranty gives you specific legal rights and you may also have other rights which vary from state to state.