Solid Brass Concentric Knobs and Plates Set Solid Brass Concentric Knobs and Plates Set. This set is modeled after concentric patterns from the late 1800’s through the 1930’s. Cast out of solid brass and polished to a mirror finish, lacquered to prevent immediate tarnishing. It translates nicely when modernizing and updating an older home while trying to maintain the small details that make an older home so appealing. The set comes with two back plates, two knobs, a shaft that connects the two knobs with set screws, and two set screws. These will not work with predrilled doors, but can be customized below to suit your needs. We also have these available in a tarnished metal, although color may vary we have attached a photo of a tarnished set below. These sets were under water during Hurricane Katrina, and are priced lower than our list price. The back plates measure 2-1/2″ x 7-9/16″ at their widest points The knobs measure 2-1/4″ in diameter and rise 2-1/4″ from the surface of the door
