The RPA is the top-selling projector mount in the industry! More RPA Series Mounts are installed in offices, schools and homes than any other mount. Features:- Independent roll, pitch and yaw for quick and precise projector registration.- Quick connect/disconnect for convenient lamp and filter access on most projectors.- Maintains registration when disconnected and doesn't affect preset adjustments.- 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.- Cable management without additional accessories.