A push-button emergency off switch is a type of electrical switch that is used to shut down a system in case of an emergency. It has a 22.5mm panel mount and is designed for easy installation on a control panel. The switch is normally in the "on" position, but when pressed, it immediately cuts off power to the system, stopping it in an emergency situation. The switch is designed for easy access and is often used in industrial settings, such as manufacturing plants or machinery, where quick shutdowns are necessary for safety. The switch is constructed with high-quality materials to ensure durability and reliability, and it is often required by safety regulations to ensure the safe operation of machinery and other equipment.