UNITED STATES - FEBRUARY 04: The shafts, club head, and wrench of Callaway Golf Co.'s new adjustable club, called the iMix, are displayed at the Callaway headquarters in Carlsbad, California, U.S., on Monday, Feb. 4, 2008. As of Jan. 1, golfers are allowed to adjust club heads and shafts on their drivers before a round, a change that has led some manufacturers to design clubs with interchangeable parts. Callaway's iMix will cost as much as $1,400 for one driver head and three shafts, about triple the cost of a top-of-the-line driver. (Photo by Jonathan Alcorn/Bloomberg via Getty Images)
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