Reda Innovations Saddlebag Posi-Locks Features: The Reda Saddlebag Posi-Lock is a true breakthrough in attaching your saddlebags to your bike Never before has there been a quick release with a 100 anti vibration mechanism that will never ever allow your bags to come off for any reason Finally you can have100 confidence your bags are securely mounted to your bike The Reda Saddlebag Posi-Locks are a genius way of attaching your bags to your bike The genius is in the threaded one piece thumbscrew that has 2 ball detents inserted past the threads of the thumbscrew, once the thumbscrew is screwed in past the bolt you flip the tab down and it locks the 2 balls in the OUT position thereby not allowing the thumbscrew to back out due to vibration