What tool is used to tip off the head of a solid shank rivet?

The correct choice is the pin punch, which is specifically designed for driving out rivets and other fasteners. When tipping off the head of a solid shank rivet, the pin punch is utilized because it can make controlled, precise contact with the rivet without damaging the surrounding structure. The rounded end of the pin punch fits well against the rivet head, allowing a mechanic to apply the necessary force effectively.

Additionally, the use of a pin punch helps to ensure that the rivet is evenly upset, providing a clean and effective head that can lock in place properly. This is important for maintaining the integrity of the assembly. Other tools, such as a drill bit, pry bar, or wrench, do not provide the necessary precision or surface area required for effectively tipping off a rivet head. Each of those tools serves different functions, making them unsuitable for this particular task.