Adjustable ceiling mount supports most bottom-mounted LCD projectors that weigh up to 26 lb. Extension arm adjusts from 23" down to 43" with a hollow tube for threading cords and cables. Ball and socket joint provides flexible tilt and 360 degree rotation for the best projection angle. The Quick Release knob detaches projector from the mounting tube for maintenance or storage. Four adjustable arms spread out to attach to the mounting nuts built into the projector casing. 8 lb. ceiling mount is made of lightweight aluminum with an off-white finish. Ceiling mount includes four sets of mounting screws and spacers to fit most projectors as well as an adjustable ceiling mounting plate to allow installation to a ceiling with up to a 90 degree angle. Ceiling mounting hardware is not included.