Panic bars, also known as crash bars or exit devices, are safety mechanisms installed on doors to provide a quick and easy way to exit a building during emergencies. They are typically mounted horizontally across the door and can be activated by pushing against the bar, allowing the door to open without the need for a key or handle. These devices are commonly found in public buildings such as schools, hospitals, and shopping centers, where large crowds may need to evacuate quickly. Panic bars are designed to meet safety codes and regulations, ensuring that exits remain accessible and functional in emergencies, thereby enhancing overall safety for occupants.