Which tool does Technician B say can cut thin sheet metal?

Tin snips are specifically designed for cutting thin sheet metal, which makes them the ideal choice in this situation. They operate similarly to scissors but are tailored for the thickness and properties of metal. The blades of tin snips are often serrated or straight, allowing for precise and clean cuts along curves and straight lines in sheet metal, enabling technicians to accomplish tasks efficiently and accurately.

In contrast, while a hacksaw can cut metal, it is more suited for thicker materials and requires a more labor-intensive approach, often resulting in less precision on thinner sheets. A chisel is primarily used for shaping or carving materials rather than cutting sheet metal. A tape measure is a tool for measuring lengths and dimensions, not for cutting at all. Therefore, among the given options, tin snips are clearly the most appropriate tool for cutting thin sheet metal.