Cutting tool mechanics make and repair precision tools using turning, milling, grinding and eroding methods. They apply different metalworking techniques such as grinding and polishing by hand, as well as mechanical grinding processes such as circular grinding. They check that the dimensions and quality of the workpieces meet the specifications. They write and optimise as required programs for the computer-aided control of machine tools. Furthermore, they assume servicing and inspection tasks on the machines, and check and measure the workpieces for quality assurance.