Mount several of these Smith Single Rod Holders on your boat, and you'll always have one ready where you need it. This rod holder is perfect for freshwater or saltwater rods. One-piece molded polypropylene construction is tough and corrosion free. 12" tall. 1-13/16" I.D. tube. Mounting hole centers are 6-1/4". Mount using up to 1/4" fasteners (not included).