Two flat plates of hardened steel having a semi-circular groove cut in the edges making contact with each other. This groove has an internal thread, so that when the two pieces are brought together in a stock a female screw is formed. It is used for cutting threads on rods, bolts, etc.

Rule set on a plate to seal, cut, shape, punch holes into plastic material. Usually made of brass or steel. Brass lasts longer but costs more. Surface area is calculated by measuring (width x length) of rule.

Tools or devices for creating a desired shape, form, or finish with a source material. Dies range from simple to complex, requiring anywhere from one to a number of impressions to form the desired shape. In forging, dies are usually paired up to exert pressure on both sides of a metal part.

sections of female thread used to cut threads onto pipe ends.

Metal blocks having cavities so shaped as to impart the desired shape to a metal workpiece when the dies are brought together.

n: a tool used to shape, form, or finish other tools or pieces of metal. For example, a threading die is used to cut threads on pipe.