Space saving design: The adjustable arm folds up against the ceiling to make room when the display is not in use, saving space in small or cramped environments. Secure lock and release: The arm features a strong and secure locking mechanism that prevents screens from inadvertently swinging down unless physically released. This mount supports 3 TVs weighing up to 66 pounds. This mount supports VESA patterns between 75x75 and 100x100.