RAM Handlebar Rail Mount with Stainless Steel U-Bolt Base. The RAM-B-149U consists of a stainless steel u-bolt base, double socket arm and diamond adapter base. The diamond adapter base has a hole pattern that matches the industry standard AMPS hole pattern and will connect to a large variety of RAM Mount and third party cradles. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. Powder Coated Marine Grade Aluminum.