The Mission F-Lock Pro Flight Punch is a superior punch that can be used as part of our F-Lock flight and ring system, as well as being compatible with all standard rings and springs. Simply punch the hole in your flights and slip the F-Lock ring or spring into the hole and attach the flight to your GripLock shaft. This creates an ultra-strong grip that keeps the flight firmly in place. The punch has been ergonomically designed for a comfortable grip. Mission F-Lock Pro Flight Punch – Heavy Duty. Create your own flight-lock flights with this handy pocket size heavy duty flight punch.