The Big Jon Clamp-On Rod Holder is designed to clamp on to Big Jon downriggers that feature a j-rod boom design. These non-adjustable angle rod holders feature heavy-duty aluminium construction and include mounting hardware. The Big Jon Clamp-On Rod Holder comes with a silver anodized finish to match Big Jon downriggers. The Big Jon Clamp-On Rod Holder is made in the U.S.A.