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.