A bench vise is a mechanical device used to hold objects securely in place while working on them. It typically consists of two parallel jaws, one fixed and one movable, which can be adjusted using a screw mechanism. Bench vises are commonly found in workshops and garages, making them essential tools for tasks like woodworking, metalworking, and assembly. These vises come in various sizes and designs, including metalworking vises and woodworking vises, each tailored for specific tasks. They are usually mounted on a workbench for stability and ease of use, allowing craftsmen to work safely and efficiently on their projects.