JUST A THOUGHT I HAD ABOUT HAVING TO HAVE A POUND COIN OR A CHARITY TOKEN EVERY TIME I WENT TO THE SUPERMARKET. NOW I DON'T, I HAVE THIS ON MY KEY RING & WHEN I'VE GOT THE TROLLEY I JUST TURN IT SLIGHTLY LEFT OR RIGHT & OUT IT COMES, THEN WHEN I'VE FINISHED & LOADED THE CAR I CAN JUST PUT THE TROLLEY BACK IN THE TROLLEY PARK.