Chief Mfg.Projector Hardware Mount Black (RPA173) Ships with custom interface bracket to fit your specific Projector Independent Roll, pitch and Yaw for quick and precise Projector Image registration Quick Projector connect and disconnect with convenient Lamp and filter access on most Projectors Maintains registration when disconnected and doesn't affect preset adjustments All-points security systems provides exclusive steel into steel locking hardware at all Connection points to protect against theft