The RAM Tough-Claw is the perfect mounting base for toolless installation and removal on round, square, and odd-shaped rails and bars. The small version of the RAM Tough-Claw includes a B size 1″ rubber ball and can quickly be clamped on rails ranging from 1.87″ to 3.25″ in outer diameter ideal for mounting mounting on the yoke of an aircraft, handlebars of bicycles and motorcycles, or even on kayak rails and roll bars. This kit includes a medium length double socket arm and the popular spring-loaded RAM X-Grip phone holder, featuring an ‘X’ design that expands and contracts to provide a perfect fit for your device even if it’s in a case. The standard size 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. For outdoor applications, the RAM X-Grip includes a device tether that is recommended for added security and peace of mind.