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• To the best of my knowledge, this is a hammer drill. I include it mainly because it’s so weird.

• This thing is actually less scary than the monster drills on the previous page, because it’s mainly for hammering, like a small jackhammer. The bit rotates, but not very fast, and masonry bits tend not to get stuck.

• A dedicated hammer drill is longer and heavier in front than a normal drill/driver, due to the more serious hammer section. This one has a normal drill chuck and can also be used for ordinary drilling.

• The SDS chuck on this hammer drill looks different from that on a regular drill, because it’s not designed to tightly grip a round shaft. Instead it loosely holds a spline shaft.

• This venerable old drill is at the upper end of what could be considered a common house-hold drill. Today you can get much smaller, lighter versions that are just as powerful, but probably not as bulletproof.

• Oh boy, I remember this drill! Who could forget the color, even if you last used it in high school decades ago?

• I actually thought this was a slightly awkward electric drill when I bid on it. It’s actually somewhat of an oddity: a pneumatic (air powered) drill that’s shaped just like an electric one, rather than like the much more common die grinders.

• This is the previous generation’s typical wall-plug powered hand-held drill

• This is a fairly serious industrial drill, but even it can be replaced by a high-end battery version, as we will see in the next section.

• This drill at an auction reminded me of my old one, so I bid on it.

• Handheld drills used to be quite large, but not especially powerful. Motor technology has improved a lot since the 1960s.

Do you have a better example of this kind of tool? Let me know by leaving a comment, and include a picture of it if you can so everyone can see!