Which of the following tools does not have any jaws on it? (1) Tin cutter (2) Multipurpose tool (3) Hack saw (4) Vice

A tin cutter, sometimes referred to as tin snips, is an essential hand tool in metalworking that is primarily designed for cutting through thin sheets of metal, particularly tin. This tool is characterized by its two long handles which provide the necessary leverage for the cutting action. The cutting action of a tin cutter is similar to that of scissors, but it is specifically engineered to handle the density and resistance of metal.

The blades of a tin cutter fit together snugly, creating a shearing action that makes clean cuts in the metal without leaving jagged edges or causing significant deformation. Think of the blades as the 'jaws' of the tin cutter which exert precise pressure to slice through metal, similar to how the jaws of an animal might clamp down on its prey.

Despite the name, modern tin cutters can cut through various other materials besides tin, such as aluminum, copper, and even slight gauges of stainless steel. They are often available in different shapes and sizes to accommodate straight cutting, left or right direction cutting, and making tight curves. Due to their specific functionality, tin cutters are an indispensable tool for electricians, plumbers, and HVAC technicians.

The multipurpose tool, commonly known as a multitool, is an ingenious invention that combines several individual functions into a single compact unit. This hand-held device is designed to be a portable toolkit for convenience and efficiency.

A typical multipurpose tool includes a pair of pliers with gripping jaws at its center. These jaws are pivotal for various tasks such as holding, bending, or straightening wires and small metal objects. Surrounding the central pliers, other tools like blades, files, screwdrivers, and sometimes even miniature saws are ingeniously folded into the tool's handles.

These additional tools do not typically have 'jaws' but are designed to swivel or slide out when needed, transforming the device's function entirely. Multipurpose tools are favored by campers, hikers, and DIY enthusiasts for their versatility and space-saving design, allowing for a wide range of applications without the need for carrying an entire toolbox.

The hack saw is a distinctive type of saw which is specifically designed for cutting through materials such as metal or plastic. Its structure is quite different from other saws as it consists of a thin, toothed blade held taut in a rigid, bow-shaped frame.

Unlike tools with 'jaws' that grip or hold materials, the hack saw cuts with a push-pull motion where the teeth on the blade bite into the workpiece during each stroke. The tension in the frame keeps the blade straight and stable, ensuring precise cuts.

It is worth mentioning that the hack saw's blade is replaceable, allowing users to switch to finer or coarser blades depending on the cutting requirements. Because of its ability to precisely cut through materials like pipe, tubing, and bar stock, the hack saw is a staple tool in workshops, plumbing, and even model making.

The vice is a robust clamping device, commonly used in workshops and manufacturing to firmly hold objects in place while they are being worked on. This tool's main components are a pair of parallel jaws—one fixed and the other movable—connected to a screw mechanism.

When the handle on the screw is turned, the movable jaw slides closer or further from the fixed jaw, clamping an object with significant force. The purpose of this compressive grip is to stabilize the workpiece, making tasks like sawing, drilling, or sanding safer and more accurate.

Vices come in numerous forms, such as bench vices, woodworker's vices, and metalworking vices, each designed to support specific materials and tasks. The strong, metal jaws can usually be augmented with soft covers, called jaw pads, to protect delicate workpieces from damage during compression.