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===Die and punch=== Die and punch sets can be used for thicker materials or materials that require large holes; this process is the most common for [[metalworking]]. The workpiece is [[Shearing (manufacturing)|sheared]] by pressing (either by machine or hand tool) the [[Punch (tool)|punch]] through the workpiece and into the [[die (manufacturing)|die]]. The middle section of the workpiece is scrap; commonly known as the [[chad (paper)|chad]] in paper and similar materials. The punch and die are shaped to produce the desired shaped hole. The clearance (the distance between the outside circumference of the punch and the inner circumference of the die) must be properly maintained to ensure a clean cut. [[Burr (metal)|Burr]]s are produced on the side of the workpiece that is against the die.<ref name="todd"/> Common applications are fruit and vegetable bags, [[hole punch]]ing and [[ticket punch]]ing.
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