This Easy Harmony XB2 modular black key selector switch head has 3 positions, operates with a stay-put mechanism with key withdrawal on the middle position. This selector switch provides a versatile interface for controlling your machines. It is easily installed and replaced on compatible complete push button units and contact blocks. It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance. It is easily installed into standard 22mm diameter panel cut-outs, ensuring compatibility when installing in pre-existing machinery. It is dust resistant and water resistant resistant thanks to its IP65, making it ideal for operation in harsh environments. Its wide range of operating temperatures from -25°C to 70°C allows versatility in usage of product. It is vibration, high pressure washer and dust resistant thanks to its IP65 protection, making it ideal for operation in harsh environments.