Brand New still in the box-$20 plus the ride.



 
Made of stainless steel. Mounts flush to the transom and has no exposed fasteners. Will accept up to 5/8" tow line, but rises only 1/2" outward. Backing plate (3" x 5") and stainless locking nuts included.

Mount
Hole": 2-1/8
Max Mount
Thickness": 2-1/8
Min Mount
Thickness": 3/4