You are looking at a Double Top Stainless Steel Cross Ballard. This was salvaged from a once working vessel that was being torn apart for scrapes.
Dock Cleats are used to secure vessels to docks. Ideally, all cleats should be sturdy, resistant to any corrosion and should be installed on the dock frame rather the just the deck itself.
The base is square with curved edges and the bottom is not solid but it has four mounting holes. The crossbar has round knobs at each ends. The top has a flat surface with an extra circle in the center of it.
This Double Top Stainless Steel Cross Ballard would be a great addition to use around your home or you could use it for its original use.
Cross Bar: 5″ long and 3/4″ knobs
Top: 2″ in diameter
Base: 3.25″ wide by 3.25″ long
Weight: 1.8 lbs.