I have just tried the marvelous alignment tool on the earth - red laser module. It is ultra compact, with only 12mm diameter laser tube. But it is just able to make very accurate dot, line and cross line alignment result. In addition, it can also be workable 24 hours continuously. Thus I have no control of myself to recommend this pen design laser alignment for users.

Besides its accurate dot, line and cross line alignment, this laser diode module is also support easy and convenient mounting, installation and operation in various working environments. It always keeps very stable and reliable performance. If you are still fallen in difficult to make super accurate alignment, you might just have a try. It has make alignment work easily.