Built to Last CNC machined aircraft grade 6061-T6 aluminum mounting plate and Fully adjustable 360 degree swivel mount Easy to Install All the necessary hardware included. Detailed instructions for easy and quick installation. Extension Length Sets the projector approximately 4 inches away from the ceiling Perfect Fit This mount is designed to fit the projector models listed in the title only. If your projector make and model is not listed, this mount may not fit. The projector plate you receive may not resemble the plate shown in the picture(s), but it will fit the projector models listed here. Compatible Projector Models Vivitek D508 D509 D510 D511 D512-3D D513W D516