I just moved into a house and the bathtub drain is missing a part. The part is on the drain and you have to turn it one way to stay open and the oppisite way to close it. I went to the local hardware store and I purchased the exact same drain. Now my only problem is how do I remove the old one. The only part that is left is the metal ring in the hole. I know the part is either held in by plumbers putty or silicon, but how do you get the old drain out?? Any help would be greatly appreciated.