Very often there is a need for penetration work. This usually happens when repairing an apartment or any construction. It is difficult to do without a broken robot to an electrician who needs to conduct a hidden wiring, that is, under plaster. It is also difficult for other workers, but the main difficulty arises in a common person who decided to independently engage in repair. Someone does not know how to do it, someone does not have an instrument, and some are even afraid of this complex and responsible work, in which you can defeat the apartment and not succeed. By the way, it will not be superfluous to learn more about industrial mountaineering on the Internet at leisure.
The main thing is that you need to learn a person who is going to do penetration work is first of all to make markings, and then everything else. In this type of work, the markup plays a huge role and if it is not done, nothing will work out. It is also important to be able to use the tool, and to know which tool you need to take for certain work. Because for different surface the walls, you need different tools. In principle, if you make markings correctly, then there should not be further difficulties. You will just follow the marginal instructions and do your job. The only thing that will distract is the dust that will be a huge amount.