The RPAO is Chief's 1st generation of low profile universal projector mounts. Perfect for stocking dealers or unplanned installations where the projector type is unknown. Independent roll, pitch and yaw for quick and precise projector registration. Quick connect/disconnect for convenient lamp and filter access on most projectors. All-Points security exclusive steel-into-steel locking hardware at all key connection points to protect against theft. Multiple installation options: flush mount to ceiling, mount with 0.25" threaded rods, or mount with 1.5" NPT threaded extension column.