Ideal for stabilizing trolling motors, the RAP-400-202U consists of the small RAMTough-Clawbase, C size medium length double socket arm, and round base adapter. The RAMTough-Clawis the perfect mounting base for quick and easy tool-less installation and removal on round, square, odd shaped rails, and bars. The RAMTough-Clawcan 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 RAMC 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.