The RAM® Rotating X-Grip® Large Phone Holder with Ball - B Size (RAM-HOL-UN10BRU) features the popular spring-loaded 'X' design that expands and contracts to provide a perfect fit for your device and pairs it with rotating hardware, allowing users to pivot their device between landscape and portrait orientations. Historically, to change orientations, users have had to loosen the knob of the double socket arm that secures their holder to the three-part mounting solution - this X-Grip® style gets rid of that hassle! Made of powder-coated, marine-grade aluminum, stainless steel components, and high-strength composite, the RAM® X-Grip® phone holder is compatible with a wide variety of RAM® double socket arms and mounting bases. This large version of the RAM® X-Grip® fits phones ranging from 1.75" to 4.5" in width and keeps your device completely functional and accessible. No matter what double socket arm and mounting base you pair the RAM® X-Grip® with, RAM® ball-and-socket technology allows for near-infinite adjustability to achieve the ideal viewing angle - while also extending the life of your phone by providing shock and vibration damping. For outdoor applications - like being used as a motorcycle phone mount - the RAM® X-Grip® includes a device tether recommended for added security and peace of mind. Spring-loaded 'X'' design for large phones with rubber caps sports great holding power without hiding your phone; includes optional device tether for peace of mind during rugged use. Easily rotate device without having to loosen the double socket arm. Compatible with any B size RAM® Mounts double socket arm; ball and socket technology allows for near-infinite adjustability. 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. Specifications: Hardware included: One (1) optional tether/ One (1) glue tube for rubber caps. Holder dimensions: Width range: 1.75" - 4.5". Depth range: 0.875" maximum. Ball size: B size (1"). Weight capacity: Standard use: 2 pounds. Heavy-duty use: 1 pound. Materials: High strength composite. Stainless steel. Weight: 0.29 pound. Additional information: Exposure to vibrations, like those generated by high-powered motorcycle engines, might impact iPhone cameras.