As others have pointed out there are dozens of tasks I would like a laser line to assist with. This is particularly valuable for line-of-sight work that extends several meters outdoors, such as B. aligning a pergola with a brick walkway. Evaluating the results, labeling them, etc. You may not need this for every situation, but in my case a good mount was necessary. I had to either prop it up with something, seal it with tape, or ask someone to hold it.