CNC machining is a digital manufacturing technology which pre-programmed computer software dictates the movement of factory tools and machinery: it produces high-accuracy parts with excellent physical properties directly from a CAD file. The process can be used to control a range of complex machinery, from grinders and lathes to mills and routers. With CNC machining, three-dimensional cutting tasks can be accomplished in a single set of prompts. Due to the high level of automation, CNC is price-competitive for both one-off custom parts and medium-volume productions.