Universal Retrofit Kit to Install your Antique Knobs in modern doors. Old Brass finish with removable O'Ring to fit any Antique Knobs, Simple to install no adapters needed Direct Factory Prices - Old Fashion Service by phone or Email. A perfect reproduction to fit Antique Knobs of the early 1900s period In the unlikely event you have a problem, we will "fix It" guaranteed Self-Connecting Rosette/Backplates-screws concealed on one side 40 years of experience making hardware for American market