The Company Unicorn was devoted to the improvement of the material for darts, and was able to present some developments that are now state-of-the-art in sports darts. 1949 Unicorn led innovation as arrows in different weight classes. Later by the Unicorn usual today made of a piece Flights were introduced in 1955 and then in printed form. Several other new features such as replaceable steel shafts, which have become the standard. Source: Wikipedia, as of November 2010.