About this item Spring-loaded ‘X’ design with rubber caps sports great holding power without hiding your phone; includes optional device tether for peace of mind during rugged use Includes U-bolt base that accommodates rails from .5″ to 1.25″ in diameter and a short length B size RAM double socket arm; ball and socket technology allows for near-infinite adjustability Device Holder Dimensions: Width Range: 1.875″ – 3.25″ Depth Range: .875″ max; Clamp Range: .5″ – 1.25″ diameter Made of powder-coated, marine-grade aluminum, stainless steel components, and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty Style:Small Phones Ideal for handlebars, the RAM-B-149Z-UN7U consists of a zinc-coated U-bolt base, medium length double socket arm, and the popular spring-loaded RAM phone holder. In addition, hardware is included to accommodate rails from .5″ to 1.25″ in diameter. The RAM features an ‘X’ design that expands and contracts to provide a perfect fit for your device C even if it’s in a case. Made of powder-coated, marine-grade aluminum, stainless steel components, and high-strength composite, this version of the RAM fits phones ranging from 1.87″ to 3.25″ in width and keeps your device completely functional and accessible. RAM ball and socket technology allows for near-infinite adjustability to achieve the ideal viewing angle C while also extending the life of your phone by providing shock and vibration damping. For outdoor applications, the RAM includes a device tether that is recommended for added security and peace of mind.