"This mount provides the strong support you need for mounting heavy LCD/CRT projectors. - 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 - To flush mount the VCM,see LPK1"