The RAM-B-138-AP8LU consists of (2 quantity) 2.5" diameter round bases with the universal AMPS hole pattern, double socket arm, locking knob and Latch-N-Lock™ model specific cradle for the Apple iPad 4, iPad 3, iPad 2 and iPad 1. 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. The cradle includes a dial combination lock for security against theft, along with 4 mounting points with pre-drilled holes on the back. The locking knob attaches to the double socket arm, combining with the dial combination lock, creating the ultimate anti-theft mount for your iPad.