The Shot Darts Flight Punch positions and precision cuts a 5mm width slot in the base of dart flights. When used with aluminum rings or dart shafts that incorporate ring systems, like the Shot Darts Eagle Claw shafts. It provides a secure fit between the shaft and flight. Basically, if you punch your flights there's no more irritating flight pop-offs and you can concentrate on your game! An essential item for any darts set up.