RAM® Double Ball Strap Hose Clamp Mount with Round Plate - Short Surface Go you can rotate the rod

you can rotate the rod holder 360-degrees

Both balls are c-size

Universal 3 inch double socket arm mount with a square base and a round base

The screen support arm stores easily when not in use

RAM® Double Ball Strap Hose Clamp Mount with Round Plate - Short Surface Go you can rotate the rodThe RAM B 108U A consists of a 1" diameter rubber ball connected at a right angle to a v shaped base, SHORT length double socket arm and 2. 5" base that contains the universal AMPS hole pattern. 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.