You can use these rings in conjunction with any Dart Flight punch.

Designed for use with any Dart Flight Punch and lockings springs or rings.

This great looking tool enables you to create your own slot-lock flights, which allows rings or springs to grip the shafts tighter than if pushed down by the flight. That provides a much more stable set up, and a much more stable flight.

Finish: White powder coated hardened steel;
Effective spring action;
Slot size - 5mm x 2mm;
Self aligning location for flight;
Designed for use with Nylon shafts with locking springs or rings