has limited the use of jigs in manufacturing, however all the computer run machines need some sort of clamping fixture for production runs. A common example is that a drill jig is not needed to guide the drill bits to the hole centers if it is done on a CNC, since it is Computer Numerically Controlled. However, fixtures are still needed to hold the part[s] in place for the operation needed. Jigs are currently needed in many areas of manufacturing but mainly for low-volume production. Terminology Die making Die making is a subdiscipline of tool making that focuses on making and maintaining dies. This often includes making punches, dies, steel rule dies, and die sets. Precision is essential in die making; punches and die steels must maintain proper clearance to produce parts accurately, and it is often necessary to have components machined with tolerances of less than one thousandth of an inch. Tool making Tool making typically means making tooling used to produce products. Common tooling includes metal forming rolls, cutting tools (such as tool bits and milling cutters), fixtures, or even whole machine tools used to manufacture, hold, or test products during their fabrication. Due to the unique nature of a tool maker's work, it is often necessary to fabricate custom tools or modify standard tools. Overlap of die making, tool making, and mold making One person may be called upon for all of the above activities, and the skills and concepts involved overlap, which is why tool and die making is often viewed as one field and is also why mold making is often viewed as a subset thereof (rather than a totally separate field). Toolrooms and toolroom methods A toolroom in the original sense of the word is a room where tools are stored; a tool crib. In larger companies, the tools stored there must be checked in and out, and there may be a person assigned to attend the area. In a factory, the toolroom refers to a space where artifacts are made and repaired, particularly tools for use throughout the rest of the factory, jigs for setups, and other parts to assist workers and, as an extension, production. In engineering and manufacturing, toolroom activity is everything related to tool-and-die facilities in contrast to production line activity. Originally a toolroom was literally in one room, but like emergency room, the term has been figuratively extended in