Unicorn Dart Flight Punch. Quick and easy to use. Simply punch the hole in your flights and slip the ring or springs into the hole and attach the flight to your nylon stems. Helps to keep a tighter grip on the stems and also helps to stop losing those springs and rings. Finish: White powder coated hardened steel;. Laser engraved Play logo;. Effective spring action;. Slot size - 5mm x 2mm;. Self aligning location for flight;. Designed for use with Nylon shafts with locking springs or rings.