VINTAGE INTERIOR DOOR KNOBS – This closet door knob set is designed for indoor use only; this classic style knob set fits square drive spindle systems commonly found in antique and vintage door hardware sets ADJUSTABLE – The door knob replacement set can adjust to accommodate different door thicknesses DURABLE & STYLISH – These vintage style door knobs are constructed of solid brass with a steel spindle; the door knob set comes in a satin nickel finish EASY TO MOUNT – Mounting hardware is included with the closet door knobs; the shanks on these closet knobs include 2 set screws (per shank) for fastening the knobs to the square spindle. NOTE: use a small dab of midgrade glue on the threads to keep handle in place DIMENSIONS – The brass door knob features 2-1/4 inch outside diameter knobs with 1-3/4 inch projection and 17/64 inch x 3-1/2 inch square spindles; please refer to the line art drawing for dimensions and compare to your needs before purchasing