Fit Flight Duralumin Spin Dart Shafts - Medium #5 (31.0mm)Fit Flight Duralumin spinning dart shafts feature a bright metallic luster and are super lightweight like the Titanium shafts. If you install flights onto a locked style shaft and then onto a spin style shaft, you may notice the flight is looser than normal and may pop off easier. Avoid this by using separate flights for locked and spin shafts. Shaft only length is the distance between the flight and the barrel. It does not include the threads or the