Plain Brass Door Knocker by Upper Deck Nullify MAKE A GREAT FIRST IMPRESSION. Add a decorative touch to your front door READY TO HANG. 8.5" x 5" knocker withmounting hardware is provided. A PERFECT PRESENT. Perfect for anyone with a blank door. MADE FROM SOLID BRASS. This door knocker adds sophistication to any door. CLASSIC STYLING. This door knocker has a traditional, simple design.