Chief RPAU Universal Projector Ceiling Mount Convenient lamp and filter access on most projectors. Disconnecting maintains registration and does not affect preset adjustments. Integrated cable management through top of the mount without additional accessories. Multiple installation options: Flush mount to ceiling, 0.25" threaded rod, or 1.5" NPT threaded extension column. All-Points Security Systems provides exclusive steel into steel locking hardware at all connection points to protect against theft.