When users are trying to make precise line alignment at various work distances, it is the best solution to make use of a Berlinlasers 5mW to 100mW 650nm red laser line generator. It projects highly visible red laser beam from a laser diode. Owing to its long developing history and mature laser diode tech, it achieves the most stable performance and the lowest price for any industrial precise line aligning work. 
This 650nm red line laser applies a qualified glass coated lens within 10 to 110 degree, which passing through up to 24 hours beam stability test and aging preventing test. It projects highly fine and straight red line within 0.5 meter to 6 meters, and freely adjusted laser line fineness. When it makes proper mounting onto industrial device, not relying on manual labor force input, it brings users no mistake and long lasting red line alignment at great distance perfectly.
Applications: laser cutting, saw mill, lumber machine, laser car wheel alignment system, laser medical therapy etc
https://www.berlinlasers.com/oem-lab-lasers/laser-line-generator