USGA stands for what ?
The " traditional and customary " rule was originally used to ban the introduction of steel club shafts ( patented in 1910 ) , as that material was not traditional for shafts ; that specific ban was rescinded in 1924 by the USGA ( the R&A would continue to ban steel shafts until 1929 ) , and steel would become universal until the development of graphite shafts whose introduction was less controversial .