This Harmony XB4 black head with key (key no. 455) for key selector switch has 3 positions and operates with a spring-return-from-right-to-center mechanism with key withdrawal on the left and center positions. This head with key provides a versatile interface for controlling your machines. It is easily installed and replaced on compatible complete key selector switch units to provide 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. It has a metal bezel, which makes it ideal for applications requiring high impact and vibration resistance. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. Secure machine and system operation with a key, only available to authorized operators. Its wide range of operating temperatures, from -40°C to 70°C, allows versatility in the usage of the product.