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

When forcing a door, the Halligan tool is primarily used in conjunction with a striking tool, typically a sledgehammer or another heavy object. The Halligan itself is designed for prying and levering, but it requires the force generated by a striking tool to be effectively driven into the latch or hinge areas of a door. This combination allows firefighters to apply significant force and leverage to break through barriers safely and efficiently.

The striking tool provides the necessary impact to drive the Halligan into place, allowing it to create leverage and apply enough force to open the door. This technique is standard practice in forcible entry operations and highlights the teamwork and coordination required during emergency situations. Using just a Halligan without a striking tool would greatly reduce the effectiveness of the operation and could potentially lead to complications in accessing an emergency scene.