The Doctor Door Knocker is sand-cast in solid Nickel Silver & Polished Chrome and highlighted with a brushed finish. The Doctor Door Knocker was designed by Michael Healy, an accomplished Rhode Island artisan. The Doctor Door Knocker is modeled after the traditional symbol used in England to distinguish the residences of doctors. In times past, if someone were in need of medical attention, the Doctor Door Knocker would help to identify the home of a physician.