Check the listing for details. Designed Security ES451-K1 Key Switch Control 1-Gang Stainless Steel Plate. Condition: Used. Listed at 16.99 USD. The Designed Security ES451-K1 Key Switch Control 1-Gang Stainless Steel Plate is a robust, high-quality access control device designed to enhance security in commercial and industrial environments. This key switch control plate features a durable 1-gang stainless steel faceplate, providing both security and a professional appearance. The ES451-K1 is designed to operate in conjunction with electronic access control systems, allowing users to manually control the locking or unlocking of doors via a physical key. It’s an ideal solution for situations where restricted access is needed, such as in secure areas, utility rooms, or high-security zones. The key switch provides an added layer of control, ensuring that only authorized personnel can operate the system. The stainless steel.