An emergency hammer (also known as a safety hammer or escape hammer) is a small, handheld safety tool designed to help passengers escape a vehicle quickly in the event of an emergency, such as a crash, fire, or submersion in water. An emergency hammer is a life-saving tool that lets you escape quickly from a vehicle when traditional exits fail—simple, cheap, and crucial in the right moment.
An emergency hammer in a train. © Wikimedia.org/Santeri Viinamäki, CC BY-SA