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 drill-down 2.5" round base and medium length, B size RAM double socket arm; ball and socket technology allows for near-infinite adjustability Not recommended for large phones or tablets; fits phones from 1.875" to 3.25" in width Made of stainless steel components and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty