In the context of machining, a cutting tool or cutter is any tool that is used to remove some material from
the work piece by means of shear deformation. Cutting may be accomplished by single-point or multipoint tools.
Single-point tools are used in turning, shaping, planing and similar operations, and remove material by means of one cutting edge.
Milling and drilling tools are often multipoint tools. It is a body having teeth or cutting edges on it. Grinding tools are also multipoint tools.