The Anchor Door Knocker is sand-cast in solid nickel silver. The anchor is the perfect symbol of stability and security in a fast-paced, ever-changing world. Display your love for boating and keep an even keel with this Anchor Door Knocker. The Michael Healy Anchor Door Knocker has been hand polished and coated with a clear lacquer to protect its original polished finish. It has been signed by Michael to confirm its authenticity and quality craftsmanship.