When green line laser alignment is being used in industrial working fields such as laser cutting, textile cutting and line positioning, car wheel forming and alignment, metal or stone cutting working fields, it is always being required to make super stable line generation in long term continuous operation. From the very beginning of the product design, laser tech professionals have made cautious selection of internal structure. This laser alignment tool adopts import 532nm green laser diode as its line emitting source. Usually the import laser diode has just got even stable and reliable laser beam emitting than formal lasers. Inside the laser tube of green laser alignment, it is filled with silicon rubber. Whatever kind of industrial line projecting working fields, this portable pen designed laser alignment tool just assures perfect performance even in harsh working environments. It has got featured advantages of fog, rain, water, shaking or damage proof. While users have made proper adjustment of targeting line direction, this advanced line alignment laser tool will always make the best line projection result on all working surfaces efficiently.