A must for any angler with a bow mount trolling motor, the RAM-108U trolling motor stabilizer consists of a C size 1.5" medium length double socket arm, 2.5" diameter round base that contains the universal AMPS hole pattern, strap hose clamp base, and drill-down 1.5" round plate with C size ball. The strap accommodates rails from 1" to 2.1" in diameter. The trolling motor stabilizer takes the vibration out of your trolling motor while protecting the trolling motor and mounting surface from damage. The maximum allowable distance between the mounting surface on the boat and the lowest point of the trolling motor shaft is 8.75”.