We utilize a specific type of self-tightening ferrule on the Professional II Series and the TiCrX Series rods.
When correctly assembled, there should be about 1/2 -inch of blank exposed at the ferrule. Although it looks a little strange, these ferrules are very effective in maintaining a positive fit and preventing lost and broken sections.
This process is very labor intensive and expensive process, which is why it is not utilized by very many rod manufacturers.
During production, the male end of the ferrule is machined to within .0001” of the female section’s ID – and at a very specific angle. You have to make sure you remove precisely the right amount of material to form the ferrule. Removing too much compromises the integrity of the blank. When the process is done correctly, the end result is a ferrule that gets tighter as it undergoes normal wear and tear rather than becoming loose and flying off or causing the rod to fail. The exposed blank area will imperceptibly become smaller and smaller over time, but will never disappear completely. Because these ferrules tighten on their own there is no need to apply ferrule wax or any other material to ensure a tight fit.