Ram Mounts Handlebar U-Bolt Double Ball Mount provides a sturdy B socket to B socket extension to users in need of extra maneuverability for their 2-Hole AMPS: 1.912″ compatible RAM Accessories. KEY FEATURES Includes zinc-coated U-bolt base that accommodates rails from .5″ to 1.25″ in diameter, medium length B size RAM® double socket arm, and diamond adapter ball base for connecting to a wide variety of device holders RAM® Mounts ball and socket technology allows for near-infinite adjustability on bicycle and motorcycle handlebars Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments Backed by a lifetime warranty The RAM Mounts 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″ to 1.25″ 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.