Direct diode made 635nm red laser line generator modules assures the purest red laser light emission from 635nm red laser diode. Employing an import 635nm red laser diode and qualified glass coated lens or separate crystal lens, configured with highly durable aircraft used aluminum alloy housing tube, this compact size tube made 635nm red laser module assures the easiest installation, and highly clear and fine red reference line projection for various industrial and high tech precise line alignment works effectively.