What is a main characteristic of the wrecking bar?

The main characteristic of the wrecking bar is its heavy weight. A wrecking bar, also known as a crowbar, is designed to withstand significant force, making it suitable for prying or demolishing heavy structures. The substantial weight helps provide the leverage needed to break through tough materials such as concrete or wood, making it a valuable tool in construction and demolition work.

The other characteristics, such as having a flexible design or being made from lightweight materials, do not align with the purpose and functionality of a wrecking bar. In fact, the tool is intentionally heavy and rigid to maximize its effectiveness in applying force during heavy-duty tasks.