In 1966, Yvon Chouinard led a significant redesign of ice axes, working with initially reluctant manufacturer Charlet to develop a ice axe with a dramatically curved pick. Chouinard believed that "a curve compatible with the arc of the axe's swing would allow the pick to stay put better in the ice. I had noticed that a standard pick would often pop out when I placed my weight on it." Chouinard's idea worked and began a period of innovation in ice axe design.