This large cast-iron hook has only one arm. The arm is also straighter than other hooks with a curved, up-lifting arm. This hook was meant to hold heavy items, such as saddles or fence stretchers.
The arm projects 7 1/2 inches from the wall. The back plate is 4 3/4 inches vertically and 2 inches across the top. There are three holes for wood screws.
This one is an old one.