Abbatron 8537 is a double-pole, double-throw (DPDT) toggle switch with a 1/2-inch mounting hole. It is commonly used in a variety of applications, including automotive vehicles, marine equipment, and everyday electronics such as computers, televisions, radios, and amplifiers. The 8537 features two terminals on the top and bottom, traditionally labeled as “common”, “Normally Open” and “Normally Closed”. It is a durable switch made of high-temperature resistant plastic- and metal-based components, making it ideal for use in harsh environments.