These vintage style door knobs are constructed of solid brass and come in a bright polished-brass finish. This set of knobs is designed for indoor use only and it includes a 17/64 in. x 3-1/2 in. steel spindle with 3/8 in. -20 threads. This classic style knob set fits square drive spindle systems commonly found in antique and vintage door hardware sets and it can adjust to accommodate different door thicknesses. The shanks on these knobs include 2 set screws (per shank) for fastening the knobs to the square spindle, but it does not include any of the following components and they must be purchased separately. The internal mortise lock body, door rosettes, trim and strike plates or the latch and fasteners.