In its simplest form, a drill is a tool that uses rotation or a chipping motion to make a hole. That’s a wide-open definition and includes everything from dental drills to tunnel boring machines. We’re going to focus on the types of drills we commonly use in construction and around the house.
Before we get too far into it, though, let’s get a couple of technical definitions straight. A drill makes holes using a drill bit. A driver fastens screws, bolts, and other fasteners using a driver bit. Most people think of both types of applications when considering a drill. So for our purposes, we’re going to group them together.