When dot measuring work is processing for quite long time, either it is pointing at close or long distance, none of visible laser pointers cannot be comparable with a 650nm red laser diode module. Available with quite long developing history and mature laser diode tech, after basic use of metal heat sink cooling system and APC, ACC driving circuit board, this dot laser alignment just gets the lowest production cost, and the most stable red dot alignment within long lasting work of 8 to 10 hours.
Any time it gets correct use of output power and easy mounting onto any industrial machine or device, not effecting by long distance or long time, it assures high precision dot alignment for laser marking, laser engraving machine, drilling system, red laser sight, high tech and lab experiment work etc.
https://www.berlinlasers.com/650nm-red-laser-diode-module
https://www.berlinlasers.com/635nm-red-laser-diode-module
https://www.berlinlasers.com/660nm-5mw-100mw-red-laser-diode-module
https://www.berlinlasers.com/