When used to force a door, a Halligan is used in conjunction with a?

The Halligan tool is a versatile instrument designed for forcible entry and is typically used in combination with a striking tool, such as a sledgehammer or mallet. The Halligan has a forked end that can be wedged into gaps, allowing firefighters to apply leverage to pry open doors. However, to generate sufficient force to effectively use the Halligan, the striking tool is essential.

The striking tool provides the necessary impact force to drive the Halligan into the door or to create the leverage needed to open it. When firefighters apply a striking force to the Halligan, they can efficiently break through obstructions or gain entry in emergencies, thus enhancing their ability to perform rescues or suppress fires efficiently.

In the context of forcible entry, the use of the Halligan in conjunction with a striking tool is a well-established technique and is critical to the success of operations requiring access to buildings. The other options, while associated with various firefighting tasks, do not directly complement the Halligan in the same way a striking tool does, making the striking tool a vital component of this forcible entry method.