All Aviaton shafts from Bull's Here you can buy Bull’s Aviation Shafts online. These shafts are made of special plane-aluminium. This new material is very strong and it will not wear down. Adding a flight to the Bull’s Aviation Shaft is very easy, the inserts become smaller and smaller so the flight will grip better. The Bull’s Aviation Shafts also comes with rubber rings and is available in 3 sizes.