The tri-fin dart flights, aka three fin dart flights, are the latest flight technology to hit the dartboards of the world. The tri-fin dart flight offers less in-flight drag, improved accuracy and fewer deflects.Flight measures: 1 3/4 inches (46mm) x 1 3/8 inches (35mm).Shaft measures: 1 7/8 inches (48mm) and has a 2BA thread.The tri-fin flight and shaft set include 3 x tri-fin flights and 3 x standard length nylon tri-fin dart flight shafts.