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.