Tool maintenance isn’t just a means to prevent sizable losses of productivity, but it also is the best way to avoid work-related accidents. An improper pickaxe, for instance, can yield disastrous results. A single chip in a cutter mattock can divert the angle of penetration when chopping roots, which could potentially end up injuring its user. This is why a regular whetstone sharpening session is recommended every month, not only to ensure the proper functioning of the tool, but to help the worker stay out of harm’s way (more on that in subchapter 4.3).