A hand drill is a manual tool that converts and amplifies circular motion of the crank into circular motion of a drill chuck.
Used primarily for boring holes in nearly all materials, the electric drill can also be used for a variety of other tasks, facilitated by a number of accessories and attachments. These include sanding, screwdriving, grinding, and mixing paint.
Although drill presses are used mainly for drilling holes, they can also be used for enlarging holes with a boring tool or finishing holes with a reamer. With the aid of a special tapping attachment and a tap, they can produce threads in a hole.