This video, part of a manufacturing techniques session, explains the importance of jigs and fixtures as auxiliary devices used to hold, support, and precisely position workpieces to improve production accuracy and efficiency. The key distinction is that a jig not only holds the workpiece but also guides the cutting tool (commonly in drilling), while a fixture only holds the workpiece without guiding the tool and is widely used in milling, turning, and welding. Their use ensures consistency, reduces machining errors, and shortens production cycles, making them especially critical in mass production and automation. Jigs and fixtures are typically made from strong, wear-resistant materials such as steel or stainless steel. Real-world applications include bicycle frame alignment before welding, automotive panel assembly, engine component machining, PCB assembly, and home appliance manufacturing. In conclusion, jigs and fixtures are essential to modern manufacturing because they enhance productivity while maintaining product quality.