While traders buy and sell all the time, investors buy and hold. And hold for a very long time, often following Warren Buffett’s advice that his favorite holding period is “forever.” Finding stocks you can keep for the infinitely long term, though, requires finding a very special type of company, one that can roll with the punches while still rewarding its shareholders. Here are two stocks that I think fit the bill: Eaton Corp (NYSE: ETN) and Emerson Electric (NYSE: EMR).