The RAM-B-149ZU consists of a zinc-coated 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® components. Included is hardware that will accommodate rails from .5" / 1.27cm / 1.27cm to 1.25" / 3.18cm / 3.18cm in diameter. A composite rail adapter can narrow the rail to a minimum width of 0.5”. Also included is a B size medium length double socket arm featuring adjustment points at both ends, allowing for near-infinite adjustability.