Howard Hughes, eclectic, reclusive and sometimes nutty billionaire was not a Horatio Alger rags to riches story. What was the source of his fortune? If you saw the movie about his life, you probably know the answer. Most of us think of his work during World War II with the Spruce Goose, the largest aircraft of its time or his buying up the casinos in Las Vegas and wresting it away from underworld control. But these ventures were not the source of his wealth, an extraordinary tool was.

Do you know what the tool that created the fortune was and why it was revolutionary? Give us your answer in the comments section below.
If you have a piece of trivia or history involving tools, home improvement, building science or mechanical e-mail me, [email protected] and we can possibly use it as one of our questions either here or on the radio show on Monday Nights.