Scotty 351 Rodmaster II Rod Holder with 244 Flush Mount Fiber reinforced engineering nylon offers strength, resilience and reliability. Also comes with a removable gimbal pin. Includes No. 244 Flush Deck Mount which has a sealed base for watertight applications (such as kayak decks). Rodmaster ll Interior Diameter: 1.85" Mount Dimensions: 4" x 2" x 2" Bolting Dimensions: 1 5/16" x 3 3/16"