You are looking at a full set of 1920s era doorknobs.
This set of doorknobs are chrome plated brass, as is evident by the 3rd photo in this listing, where a piece of the chrome plating has come off.
Despite this minor setback, this is a gorgeous set of doorknobs. In the 1920s, brass doorknobs were common in most rooms of a house. Chrome plated doorknobs were reserved for the upscale, and even then, they only had them in the bathrooms and kitchens.
Most chrome plated doorknobs didn't stand up well to the test of time, and many were removed. This makes finding a chrome doorknob in great shape very hard to find.
Included is TWO (2) Chrome Doorknobs, TWO (2) Chrome backplates, one with a keyhole, and one without, and ONE (1) Threaded Bar Piece that connects the two doorknobs together.
The doorknobs themselves measure approximately 2" in diameter, and are 2" tall.
The backplates measure approximately 5 1/2" tall by 1 5/8" at its widest point.
The threaded bar connecting the doorknobs is 7 1/2" long.