Big Jon's "Clamp-On Mounting Base" will clamp onto transoms up to 2 inches thick.

• It is constructed from machined 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 Clamp-On Mouning Base has been treated with a bright anodized finish to prevent corrosion.