If users are trying to make easy and quick response line alignment at various work distances, not easy to reach with any manual line drawing work, it makes good job with a direct diode emission made device, such as a Berlinlasers 650nm red line laser module. The advanced use of a metal heat sink cooling system and import laser diode are configured with different size tube of 16mm and 26mm metal housing tube. Every time 650nm red laser line generator gets constant power source from a 5V, 9V 1000mA DC power supply, it assures highly visible red laser beam emission and highly clear red line alignment at various work distances. Every time it makes correct use of output power and optic lens degree, it makes good job for high speed and low cost measurement for sand milling, lumber machine, high tech, and lab experiment work etc. https://www.berlinlasers.com/650nm-red-line-laser-module https://www.berlinlasers.com/650nm-red-laser-line-generator https://www.berlinlasers.com/oem-lab-lasers/laser-line-generator https://www.berlinlasers.com/