This Harmony XB4 modular black key selector switch (key no.455) has 2 positions, operates with a spring-return-to-left mechanism with key withdrawal on the left position. It has a metal bezel. This key selector switch provides a versatile interface for controlling your machines. It is easily installed into standard 22mm diameter cut-outs and connected to your control circuits with simple 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 IP66 / IP67 / IP69 / IP69K, making it ideal for operation in harsh environments.