The rotary drill, sometimes called a pistol drill, is the most basic mains powered drill. They are used for drilling holes in wood, metal or plastics. See drill drivers for their cordless equivalent.
The key considerations when choosing a rotary drill are the maximum drilling diameter required and whether you prefer to tighten the chuck by hand or by using a key supplied. This smaller size tends to be used for intricate drilling because the jaws of these chucks are able to secure the smallest of drill bits using a key supplied.
There is a often choice between single or 2 speed gears. Most professional rotary drivers have a variable speed function.