Which tool is often used to loosen rusted nuts and bolts?

The breaker bar is specifically designed for the purpose of loosening rusted or tightly secured nuts and bolts. Its long handle provides the necessary leverage to apply significant torque, which is especially useful when dealing with fasteners that have become rusted or corroded. The extended length allows a technician to generate greater force than a standard ratchet or socket wrench, making it much more effective for stubborn fasteners.

In contrast, an impact wrench is typically used for driving fasteners rather than loosening rusted ones, while a ratchet wrench and socket wrench are more suitable for general fastening tasks rather than applying the high torque needed for rusted fasteners. The breaker bar’s design and function make it an essential tool in the technician's arsenal when addressing tough or rusted connections.