Nautical Mermaid Wall Triple Key Hook w/ Verdigris Patina - 6 Inches Nautical Mermaid key hook. Made of iron with a verdigris finish. Measures 6" high x 3.25" wide x 1/2" deep with three hooks for keys, hand towels or necklaces. Easy to install with 2 pre-drilled holes at top and bottom. (Hardware not included.)