Custom-built machines are specially designed and constructed to meet specific needs or requirements. Unlike mass-produced machines, these devices are tailored to perform particular tasks, making them ideal for unique applications in industries such as manufacturing, healthcare, and technology. These machines can vary in complexity, from simple tools to advanced robotic systems. By using CAD software and 3D printing, engineers can create prototypes and refine designs before final production. Custom-built machines often enhance efficiency and productivity, as they are optimized for the intended purpose, reducing waste and improving performance.