If you want to fish with your downriggers turned out to the sides of your boat to achieve a wider spread for your lure presentation, Big Jon's "Swivel Mounting Base" is the solution you are looking for.
It is machined from billet aluminum to assure that it has the strength that is needed to securely mount your downriggers to your boat.
It accepts all Big Jon downriggers and rod holders with 4 in. x 4 in. bases.
The Swivel Mouning Base has been treated with a protective hard coat finish to prevent wear and corrosion.