on the left you see an original gov. weight basket. there is supposed to be a flexable ring betweeen the rivets, thats what drives it. it disinigrates and dissapears into your return line. see the traces of brown stuff around the rivet heads. on the right is the new upgraded solid one that won't wear out. this is from my case 530 db pump. if i kept running it like this it would wear the rivet heads off because that is all that was driveing the govenor weights. hope that helps.