A double-pole switch is an electrical switch that controls two separate circuits simultaneously. It has two sets of contacts, allowing it to interrupt both the live and neutral wires in a circuit. This type of switch is commonly used in high-voltage applications, such as in 220-volt systems, where it ensures that both wires are disconnected for safety. These switches are often found in light fixtures and appliances that require more power. By using a double-pole switch, users can safely turn off the entire circuit, reducing the risk of electrical shock and ensuring proper maintenance of connected devices.