It’s now easier to tell between locked and spinning… Spinning shafts have a rounded top and Locked shafts have a flat top. Also, the top of the locked shaft is now in a matte finish

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.

While the manufactures are using materials that should enhance the strength of their polycarbonate shafts-there is no warranty on either shafts or flights.