In order to get quite convenient and accurate dot measuring result on various targeting surfaces, it would be the best experience for users to make use of Berlinlasers red dot laser alignment. It is a direct diode emission dot measuring device, owing to its beginning power range of 5mW to 100mW, it just keeping highly stable and reliable red reference dot targeting in long term use.
This red dot laser alignment is not the same as a formal red laser pen. It is being made with external DC input power supply and thermal emitting system, which is just obtaining super nice thermal emitting and continuous red reference dot targeting in long term use. After very simple adjustment of laser beam focus, high intensity red laser beam is temporarily concentrated, and then obtaining the clearest dot measurement for laser marking, drilling system, military targeting work etc.
http://www.berlinlasers.com/economy-red-dot-projecting-laser-alignment