The dart flight, maintains its trajectory at four, 90 degree angles. COSMO DARTS achieved easy installation by adopting the Push-in System. It has reduced stress and enables players to focus on their dart game. We have also chosen and adopted the most suitable plastic resin as a material for the flights and designed a highly sophisticated injection-molded technique producing high quality flights that have combined high-performance with usability. The repeated strength tests and detailed analyses of the flight during time to market realized an ideal balance between durability and weight of the flight.