Experiments with metal shafts went via numerous phases. In 1924 the Union Components Enterprise of Torrington, Connecticut, U.S., drew a seamless shaft of higher-carbon steel which could be heat-taken care of and tempered. It had been permitted via the R&A in 1929 and substantially replaced hickory inside the early 1930s. https://johnathantahmr.wikinewspaper.com/3066599/placement_an_overview