This Cross Door Knocker designed by Michael Healy and is sand-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 Cross Door Knocker was inspired by Michael's deep Christian faith. The Cross is a sign of redemption and ultimate love. Let your Cross Door Knocker serve as a daily reminder of our Lord's teachings.