CNC workholding refers to any device or apparatus used to keep a workpiece properly positioned and immobile during the machining process. Common examples are chucks, clamps, end stops, soft or hard jaws, locators, vises, fixtures and jigs.

Fastening. One way to hold material in place is by directly fastening it to the table of the CNC router. This can be done using screws, clamps, or other types of fasteners. The advantage of this method is that it is very secure and ensures that the material will not move during machining.