"The VCM provides the strong support you need for mounting heavy LCD/CRT projectors.Features:- Independent roll, pitch and yaw adjustments for quick and precise projector registration.- Multiple installation options: flush mount to ceiling, use 0.5"" threaded rods, use a 1.5"" NPT extension column.- Quick connect/disconnect for convenient lamp and filter access on most projectors.- Cable management through top of the mount without additional accessories."