Baldwin Colonial Knob PASSAGE SET Baldwin 5410 Colonial Knob PASSAGE Set Solid Forged Brass Construction This item is a Pre-configured set designed to fit into a standard (2 1/8" bore) pre-drilled door PASSAGE FUNCTION; Includes 2 knobs, 2 backplates, latch + all of the mounting hardware Knob diameter: 2.102" Projection: 2.177" Rossette diameter: 2 5/8" Backset: 2 3/8"