Tom from SWISCO responded:
May 23, 2022
The exterior handle in the set you purchased should have had screw bosses that allow the interior and exterior handles to join together. It would be pretty odd if they didn't. That said, it's difficult to say based on your photo. Would it be possible to see the hardware in question? Would you also happen to have the older handle set on hand, still? That would give us a better idea of what you're working with. |