Designed to sit hidden above the ceiling tiles within the T-bar of a standard suspended ceiling frame, the ELPMBACC allows the installer a myriad of location possibilities for projector mounting. With over 9" of continuous movement, the plate allows for precise placement of a projector. Wingnuts allow for easy movement of the 1 1/2" pipe coupler for easy relocation without dragging your entire toolbox into the rafters with you. Security screw holds threaded pipe securely in place for added safety. Epson's unique electrical knockouts accept almost any electrical box, offering electricians maximum flexibility when wiring.