Scotty 476 Rocket Launcher rod holder comes with 241 Combination Side/Deck Mount. Tilts up and down, including upright for rod storage when travelling. Less missed strike opportunities. Rocket Launcher Inside Diameter: 1.70″. All post mount Scotty Rod Holders are fully adjustable up and down, rotating 360 degrees. Bolting Dimensions: 1 5/16″ x 3 3/16″.