This colonial style knob set fits 1/4 in.
This set of knobs is designed for indoor use only, and it includes one 2-3/4 in. The knob shanks include setscrews for securing the knobs to the square spindle. *Installation tip: Because the fasteners of the rosettes (purchased separately) require a solid surface to mount to, the large 2-1/8 in.All other components of matching vintage design must be purchased separately, to include the internal mortise lock body, the door rosettes, the trim and strike plates, or the latch and fasteners.