Ideal for stabilizing trolling motors, the RAP-400-D-202U consists of the small RAM® Tough-Claw™ base, C size long double socket arm, and round base adapter. The RAM® Tough-Claw™ is the perfect mounting base for quick and easy tool-less installation and removal on round, square, odd shaped rails, and bars. The RAM® Tough-Claw™ can be clamped on rails from 0.625" - 1.14" outer diameter. The round base adapter contains the industry standard universal AMPS hole pattern. This mount is designed with RAM® C size 1.5" diameter patented ball and socket system that has adjustment points at both ends of the double socket arm, allowing for almost infinite adjustment and perfect viewing angles.