The RAP-B-397-2-238U consists of the RAM Tough-Clamp™ clamping base, 1" ball compatible STANDARD length double socket arm and diamond base adapter. The RAM Tough-Clamp™ includes a 1" ball which can be used to mount a variety of products utilizing RAM's vast selection of mounting solutions. The diamond base adapter contains the industry standard universal AMPS hole pattern, which will connect to a large variety of RAM Mount and third party cradles. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. Clamping Dimensions:1. Flat surfaces and square rails from 0" to 1.75" thick2. Round rails from 0.75" to 1.125" OD