What type of saw is primarily used for cutting metal?

The hack saw is specifically designed for cutting metal, making it the correct choice in this context. It features a fine-toothed blade that is tensioned in a frame, allowing for effective cutting of metal materials, including various types of steel and aluminum. The design of the hack saw, with its serrated blade and straight edge, provides the necessary precision and control when making cuts in harder materials.

The other saw types listed serve different purposes or are better suited for different materials. For instance, a circular saw is more commonly used for lumber and other softer materials, while a jig saw is primarily utilized for intricate shapes and cutting curves in wood or plastic. A band saw can cut metal but is often favored for larger pieces and more complex cuts. In contrast, the specialized design and purpose of the hack saw make it ideal for metal cutting applications.