8 Inch (5 Inch c-c) Traditional Doctor's Door Knocker (Antique Brass Finish) - Measures 8 inches tall with a width of 2 1/2 inches. This knocker has a projection of 3 inches and it mounts with a hole center to center distance of 5 inch. Comes complete with the mounting hardware. Solid Brass construction for decades of service. Available in Brass, Antique Brass (shown), Oil Rubbed Bronze, Satin Nickel and Polished Nickel.