The EZ Mount Support System (Patent # 4,484,658) is available on Atlas Sound's most popular 4" round enclosures. It also accommodates the same wide selection of baffles to meet your specifications and to provide inventory flexibility. The EZ Mount Enclosure/Rail System transfers the composite weight of the loudspeaker, baffle, and enclosure to the ceiling’s support members via adjustable support rails (included). The rails may be adjusted vertically and then secured to the specially designed, pre-mounted enclosure brackets with screws (furnished). No tile bridge or time-consuming screw mounting is necessary.