A machinist vise is a tool used to securely hold workpieces in place during machining operations. It typically features two parallel jaws, one fixed and one movable, allowing for precise clamping of various materials like metal or wood. Machinist vises are essential in workshops and are often mounted on workbenches or milling machines. These vises come in various sizes and designs, including bench vises and precision vises, catering to different machining needs. They are made from durable materials, such as cast iron or steel, ensuring stability and longevity. Proper use of a machinist vise enhances accuracy and safety in machining tasks.