This Brass/Bronze Dragonfly Door Knocker was designed by Michael Healy, an accomplished Rhode Island artisan. He enjoyed studying the acrobatic flight of dragonflies while fly fishing in the pond near his cottage. On one August morning, Michael found a large dragonfly perched on the front door. The dragonfly eventually flew away but left behind a wonderful idea for Michael Healy's first door knocker design. It has been signed by Michael Healy to confirm it's authenticity. The Dragonfly has been 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.