It is no reason for users to get clear enough cross line measurement result with the assistance of high brightness blue cross laser alignment. At the same time, it is also a quite easy job for users to get clear enough blue cross line laser source targeting when this blue laser module is getting correct connection with external electric power source from DC input power supply. The general use of cross line laser module is allowing high brightness cross line generation at quite long work distance and higher lighting working occasion. Owing to its high power range emitting during cross line measurement, only if users are paying high attention to powerful blue laser light radiation and reflection, users can easily obtain super wonderful cross line positioning result on all targeting surfaces effectively. Blue Cross Laser Alignment On behalf of the most mature 445nm blue laser diode tech, the creation of blue cross laser alignment is no doubt a great technical innovation on basis of formal laser diode tech. In order to maintain its highly stable and reliable cross line positioning result in continuous cross line alignment work, this crosshair laser module just employs quite wonderful use of import 445nm blue laser diode as its blue laser beam emitting source. Comparing with formal equipped laser diode, the employment of import laser diode has just made this cross line laser alignment tool workable with at least 40% laser beam stability improvement, and getting much longer serving lifetime of more than 8000 hours under condition that this cross line laser module is properly operated by correct hands. The generating blue cross line laser source from blue cross laser alignment is always available with accurate 90 degree. There is no laser light decay or blur in process of long term continuous cross line measurement. For instance, owing to its high output power range of 50mW to 100mW, during the process of long term continuous two perpendicular blue alignment laser line positioning work, laser module tube temperature might also increase seriously. The design of this blue cross laser alignment has just taken full consideration of its thermal emitting performance. Only if it is getting larger space preserving as its metal heat sink cooling system, it can easily obtain super nice thermal stabilization in use. Once users are always remembering high security use of such high power blue laser module, and avoiding eye exposure to powerful blue laser light with a pair of laser safety goggles, this cross line laser module can easily get the most wonderful cross line positioning marvelously.