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King James IV had a set of persimmon (a hard wood) golf clubs made for him. The clubs included wooden shafts and heads. This sport was new to England and at this time there were no courses just open land. http://www.golfeurope.com/almanac/history/golf_club1.htm
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As golf made its way to America, hickory trees were used to create shafts for persimmon clubs. This allowed businesses to open for the art of making clubs.
http://www.popularmechanics.com/adventure/sports/a8984/a-brief-history-of-the-golf-club-15478412 -
Factories started making heads made of iron, instead of hardy persimmon. Iron was more consistent went further. At this time golf was becoming a more common sport.
http://www.home.aone.net.au/~byzantium/golf/ghistory.html -
Over-sized heads were made which gave forgiveness and more distance. These heads were lighter and allowed a golfer to swing faster, which allowed the amateur to shoot lower scores.
http://www.slideshare.net/foseli16/the-evolution-of-the-golf-club -
R7, the first adjustable head. This allowed for better accuracy because it allowed more predictable spin on the golf ball. They were created by an adidas company known as taylormade.
http://golfweek.com/2015/09/09/taylormade-m1-driver/