A ROFU 9200 Series (model 9220 US40) narrow stile momentary key switch is designed for controlling electric locking devices and access control systems. This single-pole, double-throw (SPDT) switch operates momentarily, returning to its original state after activation, and is rated for 10 amps at 250 volts AC or 15 amps at 125 volts AC. It features a dark anodized bronze (US40) finish on a durable 1/4-inch thick extruded aluminum cover plate, measuring 4-3/4 inches high by 1-5/8 inches wide. The key switch accepts 1-1/8 inch or 1-1/4 inch mortise cylinders (not included) and is compatible with standard straight or clover cams, facilitated by a unique adjustable switch bracket design. Installation is simplified with pinch-on wire connectors, requiring no soldering, and the hardware kit includes a cylinder locking ring and security screws. Optional features such as bi-colored LED indicators or pneumatic time delays are available with other models in the 9200 Series.