The Napa Echlin NS6589 Neutral Safety Switch is a vintage part designed for specific vehicles like the Toronado, Starfire, Catalina, and Malibu. Manufactured in the United States by NAPA, it is a black switch assembly with engine kill functionality, suitable for placement on the left side of the front dashboard. The switch is dustproof and durable, featuring OE/OEM part numbers like 1994201 and 1994225. It comes with interchangeable part numbers NS21, D2233, 1S5180, and more, providing a reliable solution for controlling vehicle safety features.