Jigs are auxiliary tools used in manufacturing processes to precisely fix workpieces (objects to be processed) and guide machining tools. This dramatically improves machining and assembly accuracy, stabilizes product quality, increases productivity, and standardizes operations. They are indispensable in a wide range of processes such as cutting, welding, assembly, and inspection, contributing to consistent quality assurance independent of operator skill. In recent years, there has been a demand for the design and manufacture of custom jigs utilizing 3D CAD/CAM, their integration into automated lines, and the development of flexible jigs to accommodate high-mix, low-volume production. These are crucial factors directly linked to improving efficiency and reducing costs in manufacturing.