These antique backplates are sold as PLATES/ROSETTES ONLY! This type of vintage door hardware is most often used when you have an older home that needs replacement plates/rosettes. These plates/rosettes are meant to replace your old existing plates/rosettes and assemble in conjuction with your existing knobs, but we do not guarantee they will fit as there are many brands of hardware that each have their own design. Please take measurements of your existing antique hardware to make sure you are ordering exactly what you need. Nostalgic Warehouse Antique hardware is subject to a 20% restock fee.