This Harmony XA2 black key-put switch has 3-positions, operates with free key on center position mechanism. It has a metal bezel. It has 2 x NO contacts. This key selector switch provides a versatile interface for controlling your machines. It is easily installed into a standard 22mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections. It provides a secure manner for authorized staff to switch between process or machine operating modes. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP65, making it ideal for operation in harsh environments.