Prime-Line GD 52142 Electric Key Switch, 3/4 In. Outside Diameter, Hardwired (Single Pack)

These electric key switches are constructed of a gray plastic plate and cylinder housing with a key plug made of metal components. This electric keyed switch features a spring-loaded action (to off position) and allows for activation of garage door opener with two redesigned terminals for easy hardwiring. The plate measures 1-5/8 in. wide x 2-1/2 in. tall, and the cylinder housing measures 1-5/16 in. long with a 3/4 in. outside diameter.