Keyhole escutcheon - brass construction, flap is hinged at the top and opens up. 2 hole (35mm centres) fixing in base plate - available in polished brass, chromium or nickel finish. Lid measures approx 26mm diameter. -- keyhole escutcheon - brass construction, flap is hinged at the top and opens up. 2 hole (35mm centres) fixing in base plate - available in polished brass,chromium or nickel finish. lid measures approx 26mm diam.