The Scallop Door Knocker is cast in solid brass. Brass and bronze are copper-based alloys. The yellow brass alloy used in many of Michael's designs contains 70% copper and produces a warm, traditional brass look. Red bronze contains almost 85% copper. This additional copper content gives the bronze alloy its rich, reddish undertone. The mirrored finish of polished brass and polished bronze is achieved through varying degrees of sanding and buffing. Michael uses these techniques to highlight or accent the raised areas on a piece. The Scallop Shell Door Knocker was designed by Michael Healy, an accomplished Rhode Island artisan. Michael grew up on Cape Cod and has happy memories of his youth spent combing the shoreline. A shell as large and pristine as your Scallop Door Knocker would have been quite a find.