Bench vise (or vice).
Description and Use
A bench vise is a mechanical tool used to secure a workpiece to allow work to be performed on it with tools such as saws, drills, or files.
It typically has one fixed jaw and one movable jaw, tightened by a main screw and handle.
The vise in the image appears to be a heavy-duty model with a swivel base, which allows the user to rotate the clamped item 360 degrees for optimal positioning.
It is often made of materials like cast iron or steel, designed to provide strong clamping force.
Key features visible in the image include the main body, the hardened steel jaws (often replaceable), the main screw with a handle, and an anvil work surface at the back.