1 7/8" Cast Iron Colonial Rosette in Matte Black

In the 19th century, plain iron rosettes such as these were paired with porcelain knobs on doors with rim or mortise type locks. Small and understated, they are again a popular choice for restoration or vintage new construction. The iron is powder coated black to prevent rusting. Please note, this rosette will not work on pre-drilled doors.

Dimensions: 1 7/8" outer diameter. Screw hole: 1 1/2" center to center. Inside collar diameter: 11/16".

How do I know what door knobs will work with a particular rosette or door plate? The knob shank diameter should be a little less than the inside collar diameter on the rosette.