The ABB M2SS2-10B is a 22.5 mm selector switch operator designed with a black bezel and knob, offering a straightforward 2-position, 90° throw operation. This non-metallic, non-illuminated switch features a maintained operating mode, making it reliable for applications where the switch stays in the selected position until changed. It meets a variety of NEMA ratings including 1, 3R, 4, 4X, 12, and 13, ensuring solid protection in different environments. Keep in mind, to get it up and running, you’ll need to add a contact block holder. You might hear folks call it a “hand off auto” switch or by catalog numbers like 320500284985. This practical selector switch is available through BSP Automation, ready to be integrated into your control panels with ease.