In the 1920s, the Spalding Company came up with a rather clever solution to golfers whose shafts would get bent over time. This wooden apparatus was marketed as a "wooden shaft straightener." Measuring 14 inches long and 2 1/2" in diameter, it could hold six hickory shafted clubs that would become straighter after a few days. Spalding patented their design on July 24, 1926. Hickory shafts would only be popular for a few more years, which explains why it's hard to locate these shaft straighteners.