Tooling holes are more than a type of mounting hole used in PCBs to aid in the assembly of printed circuit board assemblies (PCBAs). Tooling holes are used for aligning, inserting, and extracting PCBAs in higher level assemblies because they are precise mechanical references embedded into the PCB.
There is, increasingly, a sense of returning to “normal” daily life where I live. Of the state’s population, 35% have been immunized against coronavirus as of this week. Lockdowns are lifted, schools have partially reopened, and even some offices are staffing back up.