The Fir Tree Door Knocker 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 Fir Tree Door Knocker was designed by Michael Healy, an accomplished Rhode Island artisan, known for his Unique Door Knockers. A lover of nature, Michael designed this Fir Tree Door Knocker to pay homage to low sweeping pines and long walks in the woods. The Fir Tree is an ancient symbol of vigor, health and new beginnings. What better way for nature lovers to greet guests than with the strength and beauty of this Fir Tree Door Knocker.