Drill (tool)

A drill is a tool for making holes in solid material. Its most common implementation is a means to rotate and press a drill bit against, and into, the material to be drilled. Some drills do not rotate the bit, but hammer it against the piece being worked.

Primitive drills, which might be no more than a sharpened rock hammered against the work, are among the earliest human tools. Drills for some applications are still muscle-powered, but the majority of industrial drills are driven by an electrical motor or compressed air. Very large drills, such as those used to make oil wells, may be powered by a gasoline or diesel motor.