A duck-billed lock breaker is used to:

A duck-billed lock breaker is specifically designed for use in emergency situations, primarily focusing on displacing or breaking locks that are typically found on doors. The tool functions by using its unique shape—resembling a duck's bill—to effectively grab and manipulate lock mechanisms with minimal damage to the door or frame.

Using this tool can quickly gain entry where keys are unavailable, thereby enhancing the efficiency and safety of emergency responders such as firefighters or law enforcement officers. The tool is not specifically tailored for padlocks, automotive door locks, window locks, or lock cylinders, making it less effective for those applications versus its intended purpose of displacing conventional door locks.