Drill Bit Sets: 5 Fast Facts

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Fact #1. The drill is one of the most ubiquitous tools used today. It's found on every job site, in every auto body shop and repair store, and in almost every home across the country. Early variations of the drill involving a rotating rock or stick have been identified dating back many tens of thousands of years.
Fact #2. Designed by an Australian inventor, the earliest electric drill was large and cumbersome, but effective. The year 1895 saw the development of the first truly portable electric drill. When a trigger-operated, pistol grip style electric drill was released by Black & Decker in 1917, the basic design of the ideal model had been discovered.
Fact #3. For every job requiring drilling, you can find a purpose-built drill bit. That's as true for drilling through basic wooden boards as it is for drilling through solid sheets of glass. There are bits designed for fitting doorknobs into doors and there are bits intended for use only in softer metals, like copper or brass.
Fact #4. You can find a drill bit designed specifically for making holes smaller than one millimeter. At the extreme opposite end of the spectrum, there are bits that bore holes many feet across and many thousands of feet down into the earth for the purposes of oil and gas extraction.
Fact #5. A set containing lots of different varieties of drill bits might seem like a great idea. However, if you're never going to drill through sheet metal or glass, there's no need to look for bits capable of doing so. Instead, buy a set that meets your current needs with bits in a range of sizes. Afterwards, consider adding a single specialty bit later if needed for a specific purpose.