Rousso's Reproductions Affordable Fluted Glass Door Knob Set with all Hardware Needed to Install in Modern Pre-drilled Door or as Replacement Set for Older Door (Oil Rubbed Bronze) (Passage 2-3/8") V1 Both Versions fit all Modern Pre-drilled Doors With either 2-3/8 or 2-3/4 backset Ver 1.0: More affordable more labor intensive requires hot gluing of Wood adapters (See details) Ver 2.0: New ORing System and Simple easy instillation, does not require Hot gluing (See Details) New Set Screws to secure knob to spindle eliminates loose knobs and ensures the knobs solid feel See description below for in depth description of our different buying options