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

The Halligan tool is a versatile instrument often employed in forcible entry operations by firefighters. When forcing a door, the Halligan's unique design allows it to create leverage for prying open doors, but it requires a striking tool to properly apply force.

A striking tool, typically a sledgehammer or a flat-head axe, is used to strike the Halligan at specific points to drive it further into the door frame or to help create a gap. This combination of the prying capabilities of the Halligan and the striking force allows firefighters to effectively overcome the door's locking mechanism or seal.

Using a cutting tool or a separate prying tool alone would not provide the same level of effectiveness in this context. The Halligan, when paired with a striking tool, maximizes the efficiency of the entry process, illustrating the importance of using the right tools in conjunction to achieve the desired outcome in emergency situations.