【Shell Lock】fla1022 's Japan Review

It eliminates the need for subsequent darts to collide with the shaft and adds a positive element to the shaft's longevity,
It is also a convenient item that allows the folded flight to be neatly set at a 90-degree angle.
Very useful.

It can keep the folded flight at 90 degrees.
Slightly larger than the Champagne Ring.

It's pretty good at holding it in place and protecting the shaft!

It is easy to use as it can be fixed at 90 degrees.

It is black, so it will go with any color.

Shell lock is good - it even protects the shaft.
I expect more colors will be available in the near future.