Schlage 650 Series key switches utilize an innovative magnetic spring design which allows installers to configure both clockwise and counterclockwise key turn direction as well as momentary or maintained action in seconds. Single gang and narrow stile faceplates are available with numerous options which include heavy-duty plate, weather-resistant cover (single gang size only), 2 LED lights - green/red, anti-tamper switch, and Schlage Everest 29 cylinder. They operate with a 1-1/8" to 1-1/2" cylinder having a straight-type cam. Narrow style and standard single-gang faceplates in 6 finishes. Dual voltage in single gang and double pole models.