Big Round Solid Polished Brass Door Rosette Back Plates 3.25" Diameter
Beaded Edge- BIG- Sold as Pairs

These are large enough to cover predrilled door holes.
( the screw holes are 3 " apart )
Screws included with each rosette.
Sold as Pairs of 2
3.25" Diameter, accommodates 5/8" neck/ferrell, 3/8" hole in center.
Finally a back plate that works on pre drilled doors.
Another hard to find hardware piece, from The Kings Bay.