I might have one. I have been working on a 5/8 drive set. Most of my sockets are williams. My adapters are proto and snap on one is 3/4-5/8, the other is 1/2-5/8 just not sure which adapter is which brand . I might be willing to trade for a williams of the same size if you have one. I'll check today and let you know. Do you have any extra 5/8 drive sockets? I still need a few.