Interconnecting Rosettes come with two sides and one sides screws into the other side (thinner doors may require custom cut rosette screws – please indicate at checkout if you require shorter screws and include the screw length needed). Made for modern doors with a 2 1/8 inch bore hole. The dummy door knob is a fixed knob with double rosettes and is commonly used on French-style or bi-fold doors. This style is available as a single sided dummy knob (1 fixed knob), double sided dummy knob (2 fixed knobs), functional passage (non-locking) and functional privacy (locking) sets. Constructed from solid brass and hand finished.Functional door knobs come with a standard 2 3/8 inch back set, or you can request a 2 3/4 inch back set at no extra charge. Functional door knobs come with a standard 2 3/8 inch back set, or you can request a 2 3/4 inch back set at no extra charge. This particular product has a lead time of approximately 1 to 3 business days depending upon the finish.