Each of the following is a tool that can be used to help remove problem fasteners EXCEPT:

A die is a tool typically used for cutting threads on a rod or bolt rather than for removing fasteners, which is the focus of this question. When facing problem fasteners, technicians often rely on tools specifically designed for removing or extracting them.

Hacksaws are useful for cutting through problematic fasteners when they are stripped or corroded. A stud puller can assist in removing stubborn studs or bolts by applying a pulling force. Similarly, screwdrivers are often used to turn screws if they are not damaged. Since a die's purpose is distinct and not oriented toward removal of fasteners, it correctly stands out in this context.