If you are not sure of your choice to get quite clear and quick dot alignment at different work distance, you should just have a try of Berlinlasers 100mW green laser diode module. The real laser dot targeting work always has no limitation of work distance, height and others, but noncontact with processing raw material. In addition, green laser dot targeting gets three dimensions adjustment, thus green laser module can also be used for any work place, including long distance, high height, corner or other hard reaching work place etc.
This 100mW green laser diode module gets wide range output power of 5mW to 100mW, which is just getting quite wonderful dot alignment result in multiple working occasions. In addition, this laser dot alignment tool is always used as an accessory part of other industrial machine or device, getting the assistance of laser alignment mounting bracket, thus green laser dot can reach any work place, getting clear and quick dot targeting for laser marking, laser engraving, military targeting and other etc. Users should just avoid eye exposure to powerful green laser light, getting the most secured dot alignment all the time.
http://www.berlinlasers.com/532nm-green-laser-diode-module