Door levers typically will attach to the escutcheon that we manufacture as part of the door system. We work to adapt to the attachment method of each manufacture.
Custom escutcheons can be used from a hardware vendor. For this request, we would supply the vendor with a specification sheet confirming the size, screw layout, spindle layout and thumbturn layout.
Our doors are fit with a euro cylinder for the thumbturn or the thumbturn and keyed locations. Typically the thumbturn knob and euro cylinder will be supplied by the same company supplying the lever so that the hardware finish matches. For installation, the euro cylinder will fit directly into our escutcheon cut out, so no rose is needed for the euro cylinder. Door levers are set up for an 8mm spindle "on the flat."