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 motorcycle fork stem base that works with stems 12mm to 38mm in diameter and short length, B size RAM double socket arm; ball and socket technology allows for near-infinite adjustability Made of stainless steel components, high-strength composites, and powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments Backed by a lifetime warranty For in-depth installation instructions, please visit our website and download the corresponding PDF instructions