SDC key switch assemblies provide an economical method of providing authorized control for a variety of applications. A choice of several contact configurations ensures compatibility with virtually any system. Key switch assemblies are compatible with U.S. standard, 1" to 1.62" mortise key cylinders and interchangeable core cylinders. Compatibility with a new or existing facility mechanical key system is maintained. SDC’s 700 series switch assemblies come standard with stainless steel faceplates and heavy duty rated switches. Available in a narrow faceplate size to mount directly to the door frame or single gang and double gang sizes to be box mounted.