A magnetic chuck is a device used in machining to hold ferromagnetic workpieces securely in place during operations like milling or grinding. It utilizes a magnetic field to create a strong grip, allowing for precise machining without the need for clamps or vises. This enhances efficiency and accuracy in manufacturing processes. These chucks come in various sizes and configurations, including permanent and electro-magnetic types. They are commonly used in industries such as automotive and aerospace, where precision is crucial. The ability to quickly attach and detach workpieces makes magnetic chucks a popular choice among machinists and engineers.