Hercules Lever 2-3/8 in Backset Privacy with Disk Rose with CF Mechanism for 1-3/8 in to 1-3/4 in Door Flat Black Finish Door hardware is more than a way to open, close, and secure a space. There is no predetermined combination of knobs, levers, rosettes and finishes; we let you mix and match according to your own taste. To us, it is an integral part of a room's design theme.Each order is custom assembled in our Southern California facility.