A hole is nothing. Or more precisely, it’s the absence of something—wood, metal, concrete, or any number of different materials. Since holes are nothing, why do we care about them and how to make them ...

Few power tools are as versatile as a handheld drill. It makes holes in wood, steel, non-ferrous metals, concrete, drywall, plastics and goodness knows what else. It makes threaded holes to accept a ...